Fun short platformer.
I'm not quite sure you mentioned it anywhere, but I discovered that you can right-mouse-click to release the wind-up immediately and jump, which is how I beat the last platforming challenge.
Although I find the mechanic creative, I think the 2-part jump feels very hard to control and does not fit into the sort of higher speed conveyor belt and pace of the game. If it was a chiller, slower platforming game more focused on puzzles then I could see it fit better.