The game is great. No checkpoints, but it's fine already enough to see the core. The greater number than the doors' and person's mechanic is great too, though without knowing the dice's sides, you can only see two sides (the top and the one facing to the camera). The story is pretty fleshed out.
There's one time where I squash the one near the bottles and then the whole game freezes, and then the dice is rotated in wall and immobilize me. Most likely because the dice is rotated whenever hurt.
But still a great game