I really like the implementation of the rewind, that's nice. Plus the puzzles seemed puzzle-y and like I wanted to solve them. The aesthetic is rather nice too, chill.
For constructive criticism: feels gamey with the floating islands, and it took me a hot second to look in the corner for the button to press for the text. I found the clone is just janky enough that I can't determine if some of their actions are intentional, like when they glitch through the ground. From there, I was unclear on what the stacked blue doors were intended for on the last level and I feel like I cheesed it. Also, I feel like I stood in place for a long time to hold doors open, leading to a slower pace and making me wish I could just drop a dummy. The last thing is at some point I forgot the blue collectibles were actually the objective instead of the doors. Well done!
(p.s. Fullscreen next time! )