Space game (illia_d)

Space game.

I have added to the base game:
1. 3 completed levels
2. Tied them together - the players abilities evolve (fire rate, speed) and the enemies also get harder. 
3. Added background, modified the UI - added "Controls" and tied together the transition between levels.
4. Added additional info in text boxes and on-screen info.    

Created by Illia