Very fun game to play. I really enjoyed the depth that all the various monsters add to the gameplay loop (get it?). The art is great, love that teleporting animation, and the mix of 2D to 3D adds some off-putting vibes that really sell the theme. Fantastic sound effects too. The only thing I'd change is the background music; it fits the feel of the game, but after getting to 100, it gets a little old.
Overall, fantastic work guys.