Incredible game. Extremely polished, great art, awesome use of the limitation, even the title is catchy.
I had so much fun with every single level, there's clearly a lot of attention to detail and love that went into the level design and there's a ton of content.
My only note is that I think making the wall jump a little stronger would feel better. While it's totally doable as-is, it made some things mechanically challenging that distracted from the more interesting challenges of the level (strategizing).
I would also love if "w" was a jump key in addition to up arrow, since S&D do work for movement, but that's personal preference. (These constructive notes did not affect my rating, I love this game so much)