Nice first jam submission, there's a lot to like here.
The movement feels really smooth, and the main character animation and little dust/jump effects add a lot of game feel. Combat felt decent too, especially with the knockback giving you a second to breathe. And the gravity tiles were a legit surprise, flipping upside-down in a sewer platformer is such a fun twist.
The in-game tutorial was helpful, and I can definitely see this being expanded with more levels that lean into the gravity mechanic even harder. Great work for a first jam!