Honestly I hardly understand what's going on. It takes me about 7 seconds to understand what my current weapon is and what do the enemies do. Also, some of the weapons and enemies are clearly more advanced than others, which makes it possible that an unlucky combination really freaks me up. My eyes hurt a little from all the effects.
I like the effects and the fast-paced gameplay though. The visual design is clear. I like how you used color to mark the meanings of objects. I also like super-saturated juicy arcade style. Really reminds me of Ultrakill and Super Hot.