Added missing collision blocks in the 3rd level, and a door back to the first level.
Added missing collision blocks in the 3rd level, and a door back to the first level.

MarkoIvanetic/melonJS,srbala/melonJS,gopalindians/melonJS,TukekeSoft/melonJS,TukekeSoft/melonJS,srbala/melonJS,TukekeSoft/melonJS,srbala/melonJS,rlugojr/melonJS,Smoss/Enoru-eco,melonjs/melonJS,rlugojr/melonJS,gopalindians/melonJS,rlugojr/melonJS,melonjs/melonJS,gopalindians/melonJS,MarkoIvanetic/melonJS,Smoss/Enoru-eco