The concept was really good, and the level design is awesome ! It took me some time to understand the mechanics, but it was a real satisfaction to find the solution by myself, without a text prompt saying "THIS BLOCK DOES THAT, THIS LEVER DOES THIS" ! The only indication that is lacking is just indicating the keybinds (and mouse) in the game (I had to look at the description to understand that the mouse was used).
The game lacks a little bit of polish (adding some sounds, and bugfixing a bit : for example, if you jump and land on a slope or a corner, you gain a LOT of speed, and you can cheese some rooms with that =D) but it's a really, really solid entry ! Congratulations !