Fix shooting issues. Setup the environment form demo presentation

Assets/Prefabs/Bullet.prefab

@@ -67,7 +67,7 @@ MeshRenderer:
   m_RenderingLayerMask: 1
   m_RendererPriority: 0
   m_Materials:
-  - {fileID: 2100000, guid: 31321ba15b8f8eb4c954353edc038b1d, type: 2}
+  - {fileID: 2100000, guid: 7ced48a396ccf7045919ead8355ab8c6, type: 2}
   m_StaticBatchInfo:
     firstSubMesh: 0
     subMeshCount: 0
@@ -115,7 +115,7 @@ Rigidbody:
   m_IsKinematic: 0
   m_Interpolate: 0
   m_Constraints: 0
-  m_CollisionDetection: 0
+  m_CollisionDetection: 2
 --- !u!135 &8393546946202406891
 SphereCollider:
   m_ObjectHideFlags: 0
@@ -149,5 +149,6 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: e7a451ad0b53e8c0ca82f7ce15114c38, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
-  speed: 1
+  speed: 50
   damage: 20
+  timeToLive: 5