sounds and fix junglism staircase

Assets/Scenes/sr_alpha_centaurus.unity

@@ -829,6 +829,151 @@ MeshCollider:
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@@ -902,6 +1047,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: Menu
       objectReference: {fileID: 0}
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@@ -1093,3 +1242,4 @@ SceneRoots:
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   - {fileID: 263013887}
   - {fileID: 286157496}
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