Amazing aesthetic, nice puzzles and some pretty sweet gameplay. Definitely reminded me a lot of Antichamber and Manifold Garden (as mentioned below too).
A couple of minor technical things I ran into (1) when I moved the mouse quickly all the walls became black and (2) on the "jump up here" level I fell into a place where I couldn't return from, so had to quit out--meaning a reset button or just more assurance that you can't get stuck would go a long way.
That said I love the whole concept, and am excited where you'll take it in the future!