added new art assets

also fixed some bugs with collision

Assets/Prefabs/tambourine.prefab

@@ -76,7 +76,7 @@ SpriteRenderer:
   m_LightmapParameters: {fileID: 0}
   m_SortingLayerID: 0
   m_SortingLayer: 0
-  m_SortingOrder: 1
+  m_SortingOrder: 0
   m_Sprite: {fileID: 21300000, guid: b5f64a07787ea48ad8d00b3ec2d138e4, type: 3}
   m_Color: {r: 1, g: 1, b: 1, a: 1}
   m_FlipX: 0
@@ -120,6 +120,7 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 4797d7ba2c50b4594bb88bfffee1f8d0, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
+  pinned: 0
 --- !u!50 &4280484977328239622
 Rigidbody2D:
   serializedVersion: 4
@@ -145,8 +146,8 @@ Rigidbody2D:
     m_Bits: 0
   m_Interpolate: 0
   m_SleepingMode: 1
-  m_CollisionDetection: 0
-  m_Constraints: 0
+  m_CollisionDetection: 1
+  m_Constraints: 4
 --- !u!58 &3514624092989024146
 CircleCollider2D:
   m_ObjectHideFlags: 0