Big fan of the added juice. The movement really helps sell it a lot. I also totally get the vibe of the time constraint the number of bugs I learned about only after the time limit, it was too many haha!
I also think you have something here in being able to customize your own die. You could even have the dice you roll in the corner match the icons you as the player selected. Certainly lots of places to explore with this concept I think it definitely worth exploring if you have the time.