Really like the idea here!
And you managed to tie in the optional objectives into the core mechanic too, which is really impressive!
I really like that collecting all of the clocks will sometimes require you to purposely fail the level to revert back to the start after changing the environment.
I will say, I had minimal trouble collecting them all except for level 5, for some reason it took me like 15 minutes to get the clock on the far right - for whatever reason making that jump felt really precise compared to pretty much every other jump in the game. Maybe it was just an issue on my end though.
There's a lot of little touches here, like the full clear icons for each stage, and the music properly rewinding when the level does - things that you wouldn't normally expect a jam submission to have.
Really like the art style, and the fact that the title screen is also pixelated to match the rest of the pixel art.
Would be awesome to see this expanded into a full release after the jam is over. Great work!