love it! sometimes less is more! Mecanics we all know but done in a clever way. Not crazy hard as I expected, which is good; lot of rooms to learn the patterns step by step.
The animation is surprisingly good.
I would like, you know, at least a couple of lines, images, something that tells us "why" we are doing this. I know story is not the most important in that case, but it would help keeping the motivation to finish the level.
Also, yeah, having options in the pause menu, because I got rapidly annoyed by these sfx.
otherwise, great :)