Yeah the trick with hitting the side of the green instead of landing is sort of something I think I'll change. It's because the "finish the level" hitbox is the exact same length as the landing platform and I suspect that when you hit the side of the platform, the collision with the "finish the level" hitbox also happens.
As for adding random geometry gaps I think it's a great idea and I'll add more of them :) initially their purpose was to allow falling down through them but make going up through them very difficult, but I think that if the player is skilled enough to go through it then that's great.
Thanks! I'll post the video on Twitter :) and again - very impressive you got such a good time in such a short period of time :D