A very interesting idea! Would love the game to have more sound effects and not just background music. Hitting [ESC] immediately closes the game, but my first instinct to close the shop was to hit [ECS], which made me a bit sad :D There also seems to be a bug - your inventory (but not the chosen dice) gets reset after death, so e.g. there’s a 1x3 strip available from the start which you can put on your dice, and after your death you get another one in your inventory AND another one is still present on the dice. Anyway, even without this glitch I’ve managed to buy 5 such strips which made it possible to win almost all the fights by just clicking roll all the time!
Overall, a decent idea that needs some balancing and polishing, good job!