I agree with TyRuss11 in terms of the background, an irregular but logical pattern might have helped with that (Just occasional spots of different colours or along/near walls like dirt, etc), the music was a bit repetitive but still good enough that I was VIBING. The gameplay is pretty cool and I got a pretty good score (if I do say so myself). The hitback from the bullets turned out really useful at keeping back hordes and became a really useful feature.