art is cool! but there are many things to polish. in the beggining theres just a floating block there, and the shooting system is very cluncky(sorry if i didnt say that right) it bothers me that when the character flips the gun also flips when the mouse is on the other direction. the hitboxes are a little bit big for the player. sometimes when you jump over a spike, a liiittle bit of the player touches it because the hitbox isnt just right, but apart from that, cool idea! like the style and music.
edit: oh, and other thing, i did not complete the game so i might be missing something but, i dont get where the theme 3... 2.. 1. is at. sorry if i missed it.