This is a really good idea, and you managed to explore it well with some nicely designed levels. It's a really solid main mechanic, and the art and sound design compliment it all nicely. It just needs polishing and bugfixing, then you can extend it with as many levels as you can come up with!

In terms of bugs, aside from the black level bug, I also encountered an instance where the player sprite rotated after being hit with a boulder. This persisted on death and sent me into the ceiling whenever I tried to move forward.

As other people have said the player movment should be touched up a bit. I'd increase the players friction, as I seemed to slide on surfaces long after I stopped pressing the key. I'd also tweak the jump such that the player reaches the apex much quicker to reduce the floaty feeling. You take too long to reach the peak of the jump compared to the much quicker time to hit the floor. I'd also try to reduce the hang time by a tiny bit as well. I'd finally suggest widening whatever it is you're using for floor collisions, I'd often find that hitting space had no effect when trying to take a running jump off a platform.

None of these issues really take away from how fun the main mechanic is though, which definitelyshows its strength. 

On a point unrelated to the game though, I wish I could score you on feedback given. I've seen your comments on a lot of games and you seem to be giving the best constructive feedback of anyone participating in the jam. So well done, and a massive thank you from me personally!

Very nice idea, very well executed.

I loved the way the first level starts and the fact that you can actually rewind chrono guy out of the screen again. 

From my point of view, what it is lacking is some polish but that has already been commented below (mostly regarding player movement), but that is easily understandable in a game jam. I actually find it hilarious that you have a super cool death animation but no walking one...

After reading a few of your comments on other games, I'm actually sorry to not have a more constructive comment to write :(

Good job and keep making games!

This is an awesome game! One of the best platformers I've played so far!

A couple nitpicks:

I think you might need to turn on continuous collision detection on the player, I was able to squeeze into the walls a couple times.

Having a slowdown happen whenever you want to rewind something would make tracking objects to click with your cursor a lot easier!

The game has a great concept to it! A few things to point out:

I think it was level 5 or 6? The room with the 3 falling platforms at the right side. When I die, the screen goes to black, but does not fade back in. I can hear my character moving via SFX but the screen simply stays black.

The player seems to get stuck on the ramps going up and it's hard to control things while making them rewind, I would suggest making a more curved response to the rewind objects so you can follow them with your mouse, or just click and need to hold without following.

I loved the layout of the levels though, very good engagement style tutorial!

Overall, you have a good game!

Nice game, honestly. I love how the game controls and feels. The main menu is really nicely designed, could use some audio there. The concept is fairly simple but effective to how you platform towards the exit. 

I think the exit could us a bit more illumination, to provide a bit more clear indication to where it is (I honestly fumbled around a level dying outside of the world thinking a hole was the exit). Other than that, I had this weird bug which always occur at the level with 3 breaking platforms where you need to reach the rune for the middle block to fall down. Once you die, it gave a black screen. I had to Alt-F4 and after dying 3 times at the same spot I gave up replaying the whole thing again (since it did not save) - screenshot as attached the black screen (bug?)(glitch?).

Overall, a pretty solid game which can be easily expanded into a full game with some extra polish and perhaps more mechanics to the game. Like the slope where the character had problems running up towards. Pity I didn't manage to finish it, but still quite fun!

Nice job! It's a fun game and I really enjoyed passing through all the levels!