The graphics and the sounds are really great in this game! The game is a bit too open for a puzzle game though, some text indicating a story or objective would be nice. The slope jumping mechanic is very unique, I've never seen it done before, so points for innovation! The animation when you jump is very good for feedback as well. Some particle effects would be a nice inclusion though, such as running, death, or falling sand ones! Also, I found the rewind mechanic a bit confusing, so maybe having a visual indicator for when you are recording when you are rewinding back would help, such as an icon in the UI or an effect on screen.