Great game! I've gotten a little hooked on it and am enjoying so far, I've unlocked 3 levels and gotten to at least round 30 on each of them.
My only issue is that i think i ran into a bug that cause my character to not gain experience from killing enemies, i still gain levels from gems but not from exp scrolls either. This started after I lost to the boss battle with the mage in grasslands then i bought the dice from the gambler and started a new run, I hope this helps!