I liked this one a lot! It took me a bit to understand the engine, just like @OllieOA, and I'm a bit too small brain to understand the Rune of Risk/Rune of Exchange. Does the shop get more useful over time? Even though I had many powerful dice, the shop was still selling me basic dice.
Would have loved a little more knowledge of how the rune combining works. Do you have to use two dice of the same tier? Does it matter if you overload more runes of power? etc.