I LOVE THIS!
The vibe of this game is super dope. The art is really nice, platforming feels accurate and punishing, just the way I like it.
My biggest complaint would probably be remedied in a non-demo version, but more checkpoints, or at least auto-equipping the spells and such so that the player doesn't have to return to the inventory each time they die in a game that's difficult. I found I was re-equipping fireball pretty often. Maybe I need to get gud though.