The camera angle is annoying for the jumping parts. I like the mechanics, with better character movement this could make a good game. I like the art style as well.
It took me a while to realize what to do, I had to read the GDD to understand it. I like the concept, with some complexity and polish, this can be a fun game.
Man, I played at least an hour with it. I'm not sure about tetris legality, but I wish you can publish this game on steam. One of the best I played form the jam submissions so far.
For me, the intro was long. I wish I could see what certain components do to the potion, how to brew good potion. Sometimes the aim is off and hard to hit enemies. Other than these it was fun to play.