Bravo!
Your level design is on point and your game fits the theme perfectly. This game is a big win.
The only criticism I have, and the only reason I am giving it is because I feel like with just some tiny tweaks (some more juice) and some more depth this could be a great time killing game, is that there is a lot of backtracking in the beginning.
Other then that this game is great fun and I played all the way to the end after the boss.
Thank you!