This is a great idea ! There's a lot of potential behind the mechanic.
If I were to nitpick, I would however say that there is a bit of tweaking to be done:
- The rolls the hero gets are not very easy to see while rushing to get the best dice.
- The enemies switch too quickly to be able to adapt to their strengths and weaknesses.
- There are too many "no effect" combinations.
- The right side of the screen has too little visually noticeable changes when the hero wins / attacks and so it feels a bit static
- I got stuck once between two crystals because you cant go through them when youve got enough shards
Overall this is a really really good idea that very strongly appeals to the video player's more mathematical side , which is a very unique thing. However there's some tweaking to be done to truly make it feel interactive and balanced.