diff --git a/Assets/Scenes/Stairs.unity b/Assets/Scenes/Stairs.unity
index 06a13a9..35a4c62 100644
--- a/Assets/Scenes/Stairs.unity
+++ b/Assets/Scenes/Stairs.unity
@@ -98,7 +98,7 @@ LightmapSettings:
     m_TrainingDataDestination: TrainingData
     m_LightProbeSampleCountMultiplier: 4
   m_LightingDataAsset: {fileID: 0}
-  m_UseShadowmask: 0
+  m_UseShadowmask: 1
 --- !u!196 &4
 NavMeshSettings:
   serializedVersion: 2
@@ -771,13 +771,82 @@ Transform:
   m_Father: {fileID: 1108291825}
   m_RootOrder: 0
   m_LocalEulerAnglesHint: {x: 0, y: 180, z: 0}
+--- !u!1001 &10008811
+PrefabInstance:
+  m_ObjectHideFlags: 0
+  serializedVersion: 2
+  m_Modification:
+    m_TransformParent: {fileID: 0}
+    m_Modifications:
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_RootOrder
+      value: 27
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalPosition.x
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalPosition.y
+      value: 0.5
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalPosition.z
+      value: 4.5
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalRotation.w
+      value: 1
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalRotation.x
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalRotation.y
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalRotation.z
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalEulerAnglesHint.x
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalEulerAnglesHint.y
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalEulerAnglesHint.z
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720839, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_Name
+      value: Sphere
+      objectReference: {fileID: 0}
+    m_RemovedComponents: []
+  m_SourcePrefab: {fileID: 100100000, guid: 3dd5393965472a4438e901f90d336e67, type: 3}
 --- !u!43 &37677401
 Mesh:
   m_ObjectHideFlags: 0
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
-  m_Name: pb_Mesh18532
+  m_Name: pb_Mesh15370
   serializedVersion: 10
   m_SubMeshes:
   - serializedVersion: 2
@@ -940,7 +1009,7 @@ Mesh:
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
-  m_Name: pb_Mesh18402
+  m_Name: pb_Mesh15248
   serializedVersion: 10
   m_SubMeshes:
   - serializedVersion: 2
@@ -1213,7 +1282,7 @@ Mesh:
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
-  m_Name: pb_Mesh18418
+  m_Name: pb_Mesh15262
   serializedVersion: 10
   m_SubMeshes:
   - serializedVersion: 2
@@ -2136,7 +2205,7 @@ Mesh:
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
-  m_Name: pb_Mesh18710
+  m_Name: pb_Mesh15552
   serializedVersion: 10
   m_SubMeshes:
   - serializedVersion: 2
@@ -2299,7 +2368,7 @@ Mesh:
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
-  m_Name: pb_Mesh18568
+  m_Name: pb_Mesh15406
   serializedVersion: 10
   m_SubMeshes:
   - serializedVersion: 2
@@ -2462,7 +2531,7 @@ Mesh:
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
-  m_Name: pb_Mesh18514
+  m_Name: pb_Mesh15356
   serializedVersion: 10
   m_SubMeshes:
   - serializedVersion: 2
@@ -12301,7 +12370,7 @@ Mesh:
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
-  m_Name: pb_Mesh18544
+  m_Name: pb_Mesh15382
   serializedVersion: 10
   m_SubMeshes:
   - serializedVersion: 2
@@ -27127,6 +27196,75 @@ Transform:
   m_Father: {fileID: 0}
   m_RootOrder: 5
   m_LocalEulerAnglesHint: {x: 0, y: 90, z: 0}
+--- !u!1001 &892601462
+PrefabInstance:
+  m_ObjectHideFlags: 0
+  serializedVersion: 2
+  m_Modification:
+    m_TransformParent: {fileID: 0}
+    m_Modifications:
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_RootOrder
+      value: 28
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalPosition.x
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalPosition.y
+      value: 0.5
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalPosition.z
+      value: 1.5
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalRotation.w
+      value: 1
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalRotation.x
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalRotation.y
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalRotation.z
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalEulerAnglesHint.x
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalEulerAnglesHint.y
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalEulerAnglesHint.z
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720839, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_Name
+      value: Sphere
+      objectReference: {fileID: 0}
+    m_RemovedComponents: []
+  m_SourcePrefab: {fileID: 100100000, guid: 3dd5393965472a4438e901f90d336e67, type: 3}
 --- !u!1 &963194225
 GameObject:
   m_ObjectHideFlags: 0
@@ -27138,6 +27276,7 @@ GameObject:
   - component: {fileID: 963194228}
   - component: {fileID: 963194227}
   - component: {fileID: 963194226}
+  - component: {fileID: 963194229}
   m_Layer: 0
   m_Name: Main Camera
   m_TagString: MainCamera
@@ -27180,7 +27319,7 @@ Camera:
   far clip plane: 1000
   field of view: 60
   orthographic: 1
-  orthographic size: 32.84
+  orthographic size: 8
   m_Depth: -1
   m_CullingMask:
     serializedVersion: 2
@@ -27203,13 +27342,44 @@ Transform:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 963194225}
-  m_LocalRotation: {x: 0.7071068, y: 0, z: 0, w: 0.7071068}
-  m_LocalPosition: {x: 0, y: 100, z: 0}
+  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
+  m_LocalPosition: {x: 11, y: 3, z: -20}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_Children: []
   m_Father: {fileID: 0}
   m_RootOrder: 0
-  m_LocalEulerAnglesHint: {x: 90, y: 0, z: 0}
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
+--- !u!114 &963194229
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 963194225}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: a79441f348de89743a2939f4d699eac1, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  m_RenderShadows: 1
+  m_RequiresDepthTextureOption: 2
+  m_RequiresOpaqueTextureOption: 2
+  m_CameraType: 0
+  m_Cameras: []
+  m_RendererIndex: -1
+  m_VolumeLayerMask:
+    serializedVersion: 2
+    m_Bits: 1
+  m_VolumeTrigger: {fileID: 0}
+  m_RenderPostProcessing: 0
+  m_Antialiasing: 0
+  m_AntialiasingQuality: 2
+  m_StopNaN: 0
+  m_Dithering: 0
+  m_ClearDepth: 1
+  m_RequiresDepthTexture: 0
+  m_RequiresColorTexture: 0
+  m_Version: 2
 --- !u!1 &1012598478
 GameObject:
   m_ObjectHideFlags: 0
@@ -27326,7 +27496,7 @@ Mesh:
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
-  m_Name: pb_Mesh18242
+  m_Name: pb_Mesh15092
   serializedVersion: 10
   m_SubMeshes:
   - serializedVersion: 2
@@ -30542,7 +30712,7 @@ Mesh:
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
-  m_Name: pb_Mesh18376
+  m_Name: pb_Mesh15222
   serializedVersion: 10
   m_SubMeshes:
   - serializedVersion: 2
@@ -41320,6 +41490,75 @@ Transform:
   m_Father: {fileID: 0}
   m_RootOrder: 8
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
+--- !u!1001 &1248823627
+PrefabInstance:
+  m_ObjectHideFlags: 0
+  serializedVersion: 2
+  m_Modification:
+    m_TransformParent: {fileID: 0}
+    m_Modifications:
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_RootOrder
+      value: 29
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalPosition.x
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalPosition.y
+      value: 0.5
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalPosition.z
+      value: -1.5
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalRotation.w
+      value: 1
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalRotation.x
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalRotation.y
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalRotation.z
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalEulerAnglesHint.x
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalEulerAnglesHint.y
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalEulerAnglesHint.z
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720839, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_Name
+      value: Sphere
+      objectReference: {fileID: 0}
+    m_RemovedComponents: []
+  m_SourcePrefab: {fileID: 100100000, guid: 3dd5393965472a4438e901f90d336e67, type: 3}
 --- !u!1 &1252876328
 GameObject:
   m_ObjectHideFlags: 0
@@ -48555,7 +48794,7 @@ Mesh:
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
-  m_Name: pb_Mesh18318
+  m_Name: pb_Mesh15164
   serializedVersion: 10
   m_SubMeshes:
   - serializedVersion: 2
@@ -48828,7 +49067,7 @@ Mesh:
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
-  m_Name: pb_Mesh18696
+  m_Name: pb_Mesh15538
   serializedVersion: 10
   m_SubMeshes:
   - serializedVersion: 2
@@ -49101,7 +49340,7 @@ Mesh:
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
-  m_Name: pb_Mesh18466
+  m_Name: pb_Mesh15310
   serializedVersion: 10
   m_SubMeshes:
   - serializedVersion: 2
@@ -49374,7 +49613,7 @@ Mesh:
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
-  m_Name: pb_Mesh18290
+  m_Name: pb_Mesh15138
   serializedVersion: 10
   m_SubMeshes:
   - serializedVersion: 2
@@ -49537,7 +49776,7 @@ Mesh:
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
-  m_Name: pb_Mesh18256
+  m_Name: pb_Mesh15106
   serializedVersion: 10
   m_SubMeshes:
   - serializedVersion: 2
@@ -49694,6 +49933,75 @@ Mesh:
     offset: 0
     size: 0
     path: 
+--- !u!1001 &1483555285
+PrefabInstance:
+  m_ObjectHideFlags: 0
+  serializedVersion: 2
+  m_Modification:
+    m_TransformParent: {fileID: 0}
+    m_Modifications:
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_RootOrder
+      value: 25
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalPosition.x
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalPosition.y
+      value: 0.5
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalPosition.z
+      value: -4.5
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalRotation.w
+      value: 1
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalRotation.x
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalRotation.y
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalRotation.z
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalEulerAnglesHint.x
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalEulerAnglesHint.y
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalEulerAnglesHint.z
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720839, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_Name
+      value: Sphere
+      objectReference: {fileID: 0}
+    m_RemovedComponents: []
+  m_SourcePrefab: {fileID: 100100000, guid: 3dd5393965472a4438e901f90d336e67, type: 3}
 --- !u!1 &1533393728
 GameObject:
   m_ObjectHideFlags: 0
@@ -49866,7 +50174,7 @@ Mesh:
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
-  m_Name: pb_Mesh18336
+  m_Name: pb_Mesh15184
   serializedVersion: 10
   m_SubMeshes:
   - serializedVersion: 2
@@ -50029,7 +50337,7 @@ Mesh:
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
-  m_Name: pb_Mesh18444
+  m_Name: pb_Mesh15290
   serializedVersion: 10
   m_SubMeshes:
   - serializedVersion: 2
@@ -50302,7 +50610,7 @@ Mesh:
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
-  m_Name: pb_Mesh18680
+  m_Name: pb_Mesh15522
   serializedVersion: 10
   m_SubMeshes:
   - serializedVersion: 2
@@ -50465,7 +50773,7 @@ Mesh:
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
-  m_Name: pb_Mesh18592
+  m_Name: pb_Mesh15430
   serializedVersion: 10
   m_SubMeshes:
   - serializedVersion: 2
@@ -50953,7 +51261,7 @@ Mesh:
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
-  m_Name: pb_Mesh18478
+  m_Name: pb_Mesh15322
   serializedVersion: 10
   m_SubMeshes:
   - serializedVersion: 2
@@ -51110,6 +51418,75 @@ Mesh:
     offset: 0
     size: 0
     path: 
+--- !u!1001 &1908795186
+PrefabInstance:
+  m_ObjectHideFlags: 0
+  serializedVersion: 2
+  m_Modification:
+    m_TransformParent: {fileID: 0}
+    m_Modifications:
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_RootOrder
+      value: 26
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalPosition.x
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalPosition.y
+      value: 0.5
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalPosition.z
+      value: 7.5
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalRotation.w
+      value: 1
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalRotation.x
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalRotation.y
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalRotation.z
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalEulerAnglesHint.x
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalEulerAnglesHint.y
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720835, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_LocalEulerAnglesHint.z
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6426552592410720839, guid: 3dd5393965472a4438e901f90d336e67,
+        type: 3}
+      propertyPath: m_Name
+      value: Sphere
+      objectReference: {fileID: 0}
+    m_RemovedComponents: []
+  m_SourcePrefab: {fileID: 100100000, guid: 3dd5393965472a4438e901f90d336e67, type: 3}
 --- !u!1 &1952150055
 GameObject:
   m_ObjectHideFlags: 0
@@ -53313,7 +53690,7 @@ Mesh:
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
-  m_Name: pb_Mesh18388
+  m_Name: pb_Mesh15234
   serializedVersion: 10
   m_SubMeshes:
   - serializedVersion: 2
diff --git a/Assets/Scripts/MovingSphere.cs b/Assets/Scripts/MovingSphere.cs
index f9f982f..efa48b0 100644
--- a/Assets/Scripts/MovingSphere.cs
+++ b/Assets/Scripts/MovingSphere.cs
@@ -15,7 +15,7 @@ public class MovingSphere : MonoBehaviour
     private int maxAirJumps = 0;
 
     [SerializeField, Range(0f, 90f)]
-    private float maxGroundAngle = 25f;
+    private float maxGroundAngle = 25f, maxStairsAngle = 50f;
 
     [SerializeField, Range(0f, 100f)]
     float maxSnapSpeed = 100f;
@@ -24,7 +24,7 @@ public class MovingSphere : MonoBehaviour
     float probeDistance = 1f;
 
     [SerializeField]
-    LayerMask probeMask = -1;
+    LayerMask probeMask = -1, stairsMask = -1;
 
     private Rigidbody body;
 
@@ -36,12 +36,19 @@ public class MovingSphere : MonoBehaviour
     private int jumpPhase;
     private Vector3 velocity;
     private Vector3 contactNormal;
-    private float minGroundDotProduct;
+    private float minGroundDotProduct, minStairsDotProduct;
     private int stepsSinceLastGrounded, stepsSinceLastJump;
 
+    private float GetMinDot(int layer)
+    {
+        return (stairsMask & (1 << layer)) == 0 ?
+            minGroundDotProduct : minStairsDotProduct;
+    }
+
     private void OnValidate()
     {
         minGroundDotProduct = Mathf.Cos(maxGroundAngle * Mathf.Deg2Rad);
+        minStairsDotProduct = Mathf.Cos(maxStairsAngle * Mathf.Deg2Rad);
     }
 
     private void Awake()
@@ -114,10 +121,11 @@ public class MovingSphere : MonoBehaviour
 
     private void EvaluateCollision(Collision collision)
     {
+        float minDot = GetMinDot(collision.gameObject.layer);
         for (int i = 0; i < collision.contactCount; i++)
         {
             var normal = collision.GetContact(i).normal;
-            if (normal.y >= minGroundDotProduct)
+            if (normal.y >= minDot)
             {
                 groundContactCount += 1;
                 contactNormal += normal;
@@ -186,7 +194,7 @@ public class MovingSphere : MonoBehaviour
         {
             return false;
         }
-        if (hit.normal.y < minGroundDotProduct)
+        if (hit.normal.y < GetMinDot(hit.collider.gameObject.layer))
         {
             return false;
         }
diff --git a/Assets/Sphere.prefab b/Assets/Sphere.prefab
index e8573b5..0eb2ce0 100644
--- a/Assets/Sphere.prefab
+++ b/Assets/Sphere.prefab
@@ -211,8 +211,15 @@ MonoBehaviour:
   jumpHeight: 2
   maxAirJumps: 1
   maxGroundAngle: 25
+  maxStairsAngle: 50
   maxSnapSpeed: 100
   probeDistance: 1
+  probeMask:
+    serializedVersion: 2
+    m_Bits: 1075
+  stairsMask:
+    serializedVersion: 2
+    m_Bits: 1024
 --- !u!54 &6426552592410720832
 Rigidbody:
   m_ObjectHideFlags: 0
diff --git a/ProjectSettings/DynamicsManager.asset b/ProjectSettings/DynamicsManager.asset
index cdc1f3e..8a4b6f3 100644
--- a/ProjectSettings/DynamicsManager.asset
+++ b/ProjectSettings/DynamicsManager.asset
@@ -3,7 +3,7 @@
 --- !u!55 &1
 PhysicsManager:
   m_ObjectHideFlags: 0
-  serializedVersion: 11
+  serializedVersion: 13
   m_Gravity: {x: 0, y: -9.81, z: 0}
   m_DefaultMaterial: {fileID: 0}
   m_BounceThreshold: 2
@@ -17,11 +17,12 @@ PhysicsManager:
   m_ClothInterCollisionDistance: 0
   m_ClothInterCollisionStiffness: 0
   m_ContactsGeneration: 1
-  m_LayerCollisionMatrix: ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
+  m_LayerCollisionMatrix: fffbfffffffbfffffffbfffffffffffffffbfffffffbfffffffffffffffffffffffdfffffffaffffc8f9ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
   m_AutoSimulation: 1
   m_AutoSyncTransforms: 0
   m_ReuseCollisionCallbacks: 1
   m_ClothInterCollisionSettingsToggle: 0
+  m_ClothGravity: {x: 0, y: -9.81, z: 0}
   m_ContactPairsMode: 0
   m_BroadphaseType: 0
   m_WorldBounds:
@@ -31,4 +32,5 @@ PhysicsManager:
   m_FrictionType: 0
   m_EnableEnhancedDeterminism: 0
   m_EnableUnifiedHeightmaps: 1
-  m_DefaultMaxAngluarSpeed: 7
+  m_SolverType: 0
+  m_DefaultMaxAngularSpeed: 7
diff --git a/ProjectSettings/TagManager.asset b/ProjectSettings/TagManager.asset
index eabfee7..5cddc66 100644
--- a/ProjectSettings/TagManager.asset
+++ b/ProjectSettings/TagManager.asset
@@ -14,8 +14,8 @@ TagManager:
   - 
   - 
   - Agent
-  - 
-  - 
+  - Detailed
+  - Stairs
   - 
   - 
   -