So I tried out your game, and I was not having fun with these levels, specifically with stages 1, 2, and 4.
Felt a lil tight in some areas, hard to progress due to how accurate ya need to be. And was there a dive for level 1 because if not, That's a long gap for a starting level dude.
This just isn't very....replayable. If that's the right word. I would suggest leaving the tight and difficult stuff to the collectables/faster routes (if there was a focus on completing fast), and focus on making the levels more replayable with the current kit, easy enough to complete but hard to master.
Tho what kind of game did ya want to make with this?