The art is weird in a good way. It has a very unique look, and I think that's what you were trying to get across. My biggest complaint is how slow the gameplay is. Movement is slow, leveling is slow, taking damage is even slow. Moving slightly is an excrutiating task. A more minor issue that I saw is how every enemy is updating their animations at the exact same time. This just bothers me because it looks so uniform. Adding some variation to the start time of the animation would help break things up a bit.
Make those 2 changes, and I think this will be a fun little survivors-like to play.