It's a neat game, I enjoyed it quite a bit, though it is a bit difficult for the first couple of runs and then you get the hang of it. The power ups are nice, not really game breaking or OP, but rather just help with the gameplay. Though I would like some synergy among the powerups, (There are some possible one's already I think.)
The audio is fine as well.
Really like the Rat and it's animations and the big Hammer smashing. And same with the Art style, it's quite unique.
The enemies are a bit weird though - they have weird hit boxes and attack patterns, sometimes I think I hit but I don't(some responsiveness for that would be nice). The game can get quite messy with so many enemies. Though it is still fun nonetheless.
The game does not have an ending platform from the looks of it, You just fall indefinitely.