To me, this is an incredible combination of game mechanics that has a lot of potential. I really hope you consider turning this into a more polished version, or even a full game.
Though this version felt a little off. The camera didn't feel good to use, it was capping the rotation speed for the mouse controls, making it feel like it was meant for a controller. It was also inverted to what I was use to. The movement and actions were a bit sticky, and I was able to clip the boxes through each in some instances (like the last level with the offset blocks). The art was simple and maybe a bit empty, but was clear in what each set of blocks could do. I thought the music was nice and fitting for the game.