This was a cool game! I liked the inclusion of gravity fields. They made the game a lot more complex and I had to think a little before spinning the map so I would avoid the spikes. I'd only suggest adding a few more sound effects to elevate the experience. A sliding and falling sound effect that increases in volume the faster you are moving would provide a good amount of player feedback, especially on the stretches where all you can see are straight walls and have no idea how fast you are moving until you hit the floor. Otherwise, a solid submission! Nicely done :)