Great submission! I like how the game revolves around moving boxes and placing them on buttons! It keeps the game nice and simple. One problem I had was that I sometimes wouldn't be able to jump when standing on the edge of platforms. The rewinding also felt just a little slow, so maybe increase the speed a bit.
Other than that, great job and good luck! I would appreciate it if you could check out my game too! It's about a ball going through a factory as it collects screws to discover 3 different endings!