Pretty neat concept. I think you pulled the abstract graphics off pretty well. I would have liked to see a little more animation on the player character at least though. Generally it has a good aesthetic! Good enemy variation, and I like the shield ability that you get. The shoot charge is interesting to say the least!
I wish the player movement speed was just a bit faster overall, and maybe the jump a little less high. I enjoyed the game though, and really loved all the hidden spots that you made!