Merge pull request #58 from Daikatana/master

Moved background that goes with MikeM level to correct spot, and added note for powerups
Small update to game menu.

Tell prof to look in game menu for game instructions.
Fix bug with enemy bullets

Fixed bug where enemies' bullets will stop updating when they fall off
the level.
Merge pull request #18 from MikePaNtZ/master

Just taking the latest fix for fun playing pleasure