Wow, such an interesting approach!
I haven't seen such a cool approach to the classic Rubik's Cube on a digital game like this! I had no one to play with, but I still enjoyed the game. I like your approach to the theme and its limitations. Also, I'm glad that you have used such a cool music track by Kevin MacLeod! Apart from those, it is always nice to see a Godot Engine developer!
Good job!