Thanks so much for the honest feedback, I appreciate it tons! Thanks for complementing my level design, I found it was one of the strong points of the game so I'm glad you thought so as well. Another thing, the boxes movement was meant to additive, like you said, but it was really difficult for me to get that working seeing as I'm using physics based movement, and yeah, the level with the blue and yellow key was pretty annoying if I do say so.