The game is now very close to completion. There’s 20 levels in total, and nineteen in this demo. The boss is not included.

http://www.mediafire.com/?xjv4vyzpcta17k1

 Checklist
 - Retouch all 20 levels' backgrounds
 - Make a boss
 - Menu stuff, and pause screen stuff: end game / skip level
 - Saving progress
 - More sound effects, background music