Unity 2D UFO Lesson 2 Adding Collision - jasonweibel/HyperStream-Unity GitHub Wiki

Hyperstream : Unity 2D UFO Lesson 2 - Adding Collision

In Unity, select the Background game object and add a Box Collider 2D.
Set Offset X to 14.3
Set Offset Y to 0
Set Size X to 3.3
Set Size Y to 31.64
Add a second Box Collider 2D.
Set Offset X to -14.3
Set Offset Y to 0
Set Size X to 3.3
Set Size Y to 31.64
Add a third Box Collider 2D.
Set Offset X to 0
Set Offset Y to 14.3
Set Size X to 31.64
Set Size Y to 3.3
Add a forth Box Collider 2D.
Set Offset X to 0
Set Offset Y to -14.3
Set Size X to 31.64
Set Size Y to 3.3