Nice game, it looks really cool. I really like the aesthetic with the floating blocks, it looks great!
The rewind mechanic also works well.
My only problem is the jumping, which feels a bit finicky. I suspect that's due to there being no air control. There have also been a couple of times where I walked straight of the edge, while I'm pretty sure pressed space on time. So either I suck at video games, or you might want to look into coyote time :D
I'd really appreciate it if you would have a look at my game as well, and be sure to download the smaller version.