Interesting concept, great design. For some reason the buttons on game over / next level screen weren't doing anything; was that a bug or did you run out of time?
In any case the art style reminded me of paper sorcerer but with its own unique twist; really well done. Combat balancing is off but you're already aware and it's something that's really, really hard to do in 48h, anyway. I'm honestly surprised it works as well as it does, good job!
Even with your limited prototype I could feel that certain itch to get more loot and puzzle the right combinations of tiles to maximize the rewards. This really has the potential for a solid puzzle-rpg-hybrid :)