This game is awesome ! There are a lot of games where we switch between a current level and a rewound level, and in this kind of game I'm often lost and it's hard to remember positions of switches or blocks. The great thing about your game, it's the concept that we can rewind only sections of the level. It's great to paint the world and it's easier to remember switch positions. It's a really good idea ! Pixel art and the music are great too ! I'm just frustrated that the game is too short haha.
Maybe the camera could be more smooth and you could add more sound effects.
Definitely one of my favorite game from the game jam submissions, Good job !