Two simple improvements will make this game a lot better: 1. at the start zoom out by a factor of 5 or 10 (and never zoom in closer than that) 2. Make jumping off the asteroids more intuitive (like, v'=v+v_r instead of v'=(|v|+1)v_r, where v, v' and v_r are vectors).
Looks like I aced this game :D At the end, it took over 2 minutes to run around the whole planet. Iceballs are really valuable and planet expanding effect seems to be diminishing, so don't hesitate to turn back to collect them all. Great underrated game, 5/5
 "Escape the Red Giant"){kind=icon}
 "Knightmare Tower"){kind=icon}
 "run.don't.stop"){kind=icon}
 "Arkandian Revenant"){kind=icon}