This is a great game!
But, the main mechanic of placing the dice in the correct place isn't even a mechanic. More of a way to make my runs slower. You could have ditched that entirely and the game would be the same.
I didn't get to a 5th level dice, but limitations at this point is something that you could always add in a 3 slots for 3 dices..
I allow myself to say that because I played this for almost an hour and really enjoyed it, and I think that you can continue to develop it to a full pledged game.
Also, the healer enemy is quite annoying. Reminds me of those fights in pokemon where the enemy trainer would always heal up, just delaying the outcome.
Overall, the game is awesome! In terms of the theme it didn't click for me, but I see what you aimed for.
Well done!