Great execution, awesome graphics.
I really love 3 things:
1) transitions - when left and right side of the screen collapse together - it just feels so smooth and visually appealing
2) music - I love that everything has it's sound effects
3) I love this chromatic aberration effect on rewinding the time
I don't like 2 things:
1) you have to almost perfectly position a square in a certain position in order to complete the level - puzzles could be easier in my opinion
2) there is no cursor :)