I finished it using the spam space bar fly and the other way to fly to finish in 21:13.344.
Yeah. I opted to keep this "feature" because without it completing the game could be impossible. I have two thoughts about it: remove the multiple jumps completely or just reduce the power of the subjacent jumps. Let me know if you have any preferences. I'll appreciate it a lot.
And congratulations because you are the FIRST successful speedrunner of the John The Icecube.