Nice take on the Idle dungeon crawler. I like the mechanic of 'upgrading' the dice by increasing both the max and minimum values. If you continue to develop it would be good to see more dice mechanics (maybe elemental spells/enemies - you attack with ice or fire depending on the dice roll?) and more alternatives of characters to add to your team.
the 8 bit art is cute, would be good to see more detail if you have more time.
My only criticism besides the known bugs is that it took me a second to understand what was happening, the animations & dice rolls are a little quick.