Very well done retro arcade feel - complete with cut scene description and even boss at the end of the wave. Nice particle effects, etc. Oh, using mouse and keyboard it seems to stick on movement when I fired, perhaps intended or my bad keyboard/mouse? All good and solid submission. Also, I did feel the Wave progression 1..10, and on my second time I noticed the galaxian style enemy movement (which I was going to recommend, but see that you have it already! awesome)