Clicking the level cleared retry button doesn't do anything, I had to guess that 'R' would retry and that worked.
Other than that, everything's great so I'll post some individual level feedback:
The solution to level 3 is to ignore the game's mechanic. I don't think rolling itself is bad and it's okay as a sort of "you can just roll!" tutorial but the rolling feels too slow for it to be a good solution.
Level 8 gives you no reason to actually go for the apples, it's just a waiting game. Again, too slow.
Level 11 doesn't seem to be anything new, it just reminds me of an earlier level that's much the same but it's somehow even simpler with the same "build up momentum because you'll get all your meter back anyway". Maybe it could swap places with that earlier level? But then level 12 is the same concept again... Not sure what to do about that.
Level 13 should have apples on both the lower and upper routes. It's still better to go the upper route but it means you have to ask yourself which route is better instead of having the game set it out for you.
Level 15: This one is frustrating because you have to wait to make the dash and then the entryway often deflects you, it wouldn't be as bad if the opening was curved inwards to be a gentler slope. You still have to work out the solution even if you make it easier.
Level 16: The 3-star is a bit too generous.
I stopped doing 3 stars after level 21, too much fine tuning with the timing.