The movement at the beginning of level is possibly a bug: regardless where the dice are in the beginning, they all teleport to a specific spot and then start moving. Depending on the dice order this may render a level possibly unsolvable, although I haven’t encounter one.
Also the rolling of dice also depends on dice order; two dice side-by-side rolling along the direction they align on will roll both on one direction and roll only one on the opposite direction.
The presentation is pretty good! The math symbol stick out from the dice make it easier to see what symbol it is. Many dice in a level is both an advantage and disadvantage; probably need some proper introduction.