But it needs some improvements.
1 - could it be made so that the keys on the number pad also work for the numbers. Being left handed I find using the number keys difficult to use without getting destroyed.
2 - Could the Emergency Situations be separated and moved to different keys (maybe keys 7, 8 & 9). Only having one in the later levels makes it really difficult especially if you when the ship that fires in all directions appears in twos and you don't get to them quick enough. The screen becomes filled with projectiles and it becomes impossible to dodge.