Very nice concept, loved the art (I'm a minimalist), the sounds and the mechanic
Struggled a bit at first, but by doing the levels more times I understood them better
Only a couple of things I'd change, when resetting I'd move the boxes in the same places, and the door that take me to the same level I already did without having the ability to come back is a bit annoying, but at least I did them way faster, by getting used to commands and having abilities unlocked
Overall, it was very fun, would love to see new mechanics, as red cubes/blue ones etc. Don't take this too seriously as I still feel like the ones you introduced are more than enough :)