Great work. The visuals were really nice and everything felt really intuitive and readable. And the cubes are so cute xD. Can't wait for the bug fix.
There was only one thing I felt was kind of confusing or maybe misdirecting. Do the ice physics interact with the non-Main cube? I was just confused that the other cube stopped moving, which was my first assumption would happen. And once I understood, I just thought that it might have been a missed opportunity for different puzzles.