it was pretty good i came 13 in America but could use some sound

Holy crap, I took bronze for Germany!

Could use some sound, though.

It's ok. It runs smoothly, and looks nice, but I don't think it would be fun to just sit down and click thousands of times to win. There is nothing to make it more interesting.

"A simple pixel shooting game." Way too simple if you ask me. There is no sound, and your controls are stiff to the point which makes it nearly impossible to compensate for the enemy's approach speed. How are you realistically supposed to "finish" this game? I can't see how this is an improvement from Space Invaders, if it was intended to be.
Try coming up with a more creative concept, and remember to test play always. 0 / 10

Space invaders needs some polishing and music, the waves of npcs come or too late or too fast