I don't have a querty keyboard so playing this is really annoying. Consider adding an options menu for accessability, including keybinds and maybe also a colour-blind option, though I don't know if that is needed.
Also, the walking speed is a bit slow and you should be able to see the all the dice's sides when having one selected. Also, you should be able to see your health and dice outside of battle.
That last level (3-13) would be so much better if the flying guy started on the left instead of the right. Now you have to wait for the cycle every time.