Really really cool game, really cool mechanics! Pulse pounding soundtrack is great and sound effects keep things exciting. It does a great job of starting off easy and then ramping up the difficulty consistently; very balanced. Sometimes the negative space can feel buggy and I got a few deaths that felt like it happened because I touched the corner of a narrow space without any obstacle nearby, but it happened quick so maybe I did get smooshed? My only other criticism is that I didn't like how being in a moving box would move you along the floor with it when going left and right which, while was some added challenge, felt more frustrating than like something adding to the gameplay. I'd recommend trying to remove that and seeing how it feels, but I could be completely off with that. Either way, this is fantastic!