Similar to Cormorant42, I was not even expecting something running, and this turns out to look good, plays super smooth, has a cool cutscene, and you can play as a cat (which I'm partial, too, haha)! It also has a nice level flow and pretty good enemy placement. I love the look of the glowing mushrooms, and hate how hard it is to hit the bats xD
It did, however, lock up when going up to the room above the first health crystal. I wonder if that's just where the work ended for the jam or if it's a bug cutting off whatever else you might've put together. It would be extra sad if it were the latter, because I was definitely enjoying the game!