Quite tricky, but a bit mysterious as well. Not quite in the palette, but has its own somewhat oppressive atmosphere. 

This is the dark souls of cube platformers. I couldn't get past the part where the path branches left+right

For a game involving a fast moving and jumping cube, avoiding one hit kill obstacles, it felt nice to not always be moving in one direction. The trick blocks, while being a nice gimmick, caused a lot of restarts. With 0 checkpoints I was spending more time playing the first level than the second level that featured the fake hazard blocks and fake safe blocks. Having gotten past the upper fake squares, I suffered from thinking that the first portal of two was fake where in reality, the second portal was the trap. It didn't kill me at first, but it instead dropped me over an infinitely long hazard block.

This game would be better with the inclusion of checkpoints at the beginning of each level (the exit of a safe portal) at the least.