The game atmosphere is great, especially with the dramatic opening. I have also not seen anywhere else the platform stop for a while which was really nice (though the movement on the platforms is a bit buggy). I would also add move checkpoints. My main issue was getting lost in the level - I got the cube on the moving platform but then dropped it. I am not sure if this was intended as the platform didnt't move back (even on box respawn). Also the platform should be a bit wider so moving the box would be easier. Lastly, I would add back the pause menu with Esc.