I absolutely loved this! It's very commendabe the level of polish that the game has in such short timeframe. The animations were funny, music and SFX was really on point and the puzzles were fun.
As a matter of personal taste, I'd have the zombies move just tiny bit faster (and maybe compensating by lowering a tad bit how much they can float in the air) and also make the next one (after killing the current) appear faster to reduce downtime as much as possible.
Very cool game. Good job!