I loved the main menu and post-processing effects, though I agree with the others that you shouldn't have bloom quite that high. Personally, I dislike the earrape 8-bit FX, though they weren't bad. Gameplay felt a bit boring, though, since there was no way I couldn't do more damage when more enemies came. I tip my hat to your music.
Oh, and I would have preferred moving with WASD or the arrow keys (give the choice)