Very fun survivor type game! I beat it first try!
The mobs look great and the music and sfx were awesome.
Could just be a browser issue, but once there were a lot of mobs that were spawned the game started lagging a lot, which made it difficult to play.
Also it seems like the drop rates on health items and magnets were very high. I was getting a magnet pretty consistently and never felt the need to have to go pick up XP myself because I knew a magnet would show up soon.
Overall great game! Keep at it!