Creative idea, if a bit hard to play outside of just using trial and error, especially with the enemy stages. If you were to make any updates, one suggestion I would have is to allow you to simply left click with the mouse on a tile to move to it, as WASD in a 45 degree perspective is always a bit difficult to get used to.
Furthermore if you were to expand this to a sokoban-y puzzle game, It would probably be nice if the game starts with a simpler dice and slowly builds up level designs/complexity of the dice to allow the player to build up some heuristics of ways to maneuver a dice to get it to face the way they want.
Cool concept that I can see having some more potential with some more time in the oven 👍