This is neat! The effects are fantastic. I found the character moved very quickly in comparison to the camera (where that was a factor), though. I would have liked to be able to Sonic the Hedgehog my way through long stretches of level but in practice mashed up against the edge of the screen almost immediately. I actually feel as though more of those big levels might suit the character movement better: the smaller, more puzzle-based ones felt a little constraining. Also I’m not positive I ever quite grasped what I was doing: shift didn’t seem to jump, but I found I could get through okay by using space (dash?) instead, but that behaved differently to pressing down, which the instructions say is dash. On that note, it would have helped to be able to play without going into fullscreen, just to be able to keep those instructions on screen. But that wouldn’t matter if I were taking a longer crack at it and had more time to get used to the controls: I’d totally play a bigger version of this.