Very well made! One problem I have is that its not polished in my opinion, when you die, and retry waves continue playing in the first level. There are also some other things such as how the firey demon isn't much faster. As well as hard mode not doing anything, and sometimes you can also get softlocked in a room, where a wave is still progressing, but there are no more enemeis spawning. There is also no way to regenerate health, speaking of which, the UI should be smaller and be in positions where they dont mess with player view, that way they dont have to be transparent. Layering is an issue, but i dont really blame you for that (scratch layering is an actual dumpster fire.) Also the collision in the room with the big machine thing is kind of wonky. You can also "attract" the currency from across walls. Other than that, this game is fantastically made. The pixel art is gorgeous, you are an amazing artist!