Wow this was a lot more challenging that I had originally thought it looked! The timing of the physicsy pulses of speed gets real tricky the more and more you get into it, especially with those gravity/galaxy things. I'd say if you continue this after the jam, maybe add some animation to the gravity pools / galaxies, and maybe zoom the player out a bit more (or give them an option to zoom) so they can see whats coming easier? Otherwise, great!