Extremly creative game! Upgrading dice is a very clever mecanic and I like it that you can either go for consistency or play a lot more risky.
The presentation is solid. Some background music would be nice and some things, like the floor could look a bit nicer, but for a game made in 48 hours it's good.
The game is pretty fun, I played it all the way to the end. I personally prefer having a bit more influence during combat but that doesn't stop the game from being adictive. The game is pretty well balanced, except for crits, I think they're a bit too strong. Making it so you can only roll 1 number guarntees crits. Therefore going for consistency is waaay more rewarding then playing risky with many numbers on the dice. Also it would've been cool if every character had a unique effect.