Overall a pretty good game, my best time was 1:57.37!
The mechanic is nice, although it would've probably fit better if you related it more to magnets instead of gravity. The graphics are simplistic but I think that fits the game pretty well. The shadow rendering and the animations in the gravity orb are good too. The level transitions are good, although depending on how you're loading new levels in they should maybe stop the timer so it's not affected by load times. I liked how you introduced the red zone mechanic, the difficulty curve is pretty good and things are explained pretty well, although the last level was probably a bit too hard since the space between the spikes is very tight. Some UI like a main menu would be nice, and it'd be nice to have some sort of leaderboard so you can compare between your previous playthroughs and other people. Somewhere halfway I also got the introduction text again for some reason.
Good job :)