Invert

A pretty decent idea. Controls are a little janky (fell too far a lot of times because the game didn't detect multiple key presses), and it'd be good to have some indicator of how far you can "fall" safely without getting teleported back to the start of the level, but I think it's worth spending time ironing the creases out on this: it has promise. (Oh, and maybe personal preference, but the default camera should probably be a bit further away: it's sometimes hard to see where the next platform is, meaning sometimes deliberately messing with gravity just to pull the camera out!)
Did have an issue on one level getting stuck out-of-bounds with no way to progress: I've put in a bug report on this. May be worth having a key for the player to force-teleport themselves to the start of the level.