The movement is really nice and fits really well with the levels. The art style is funny but pretty good. The levels are designed really well and even for someone like me who doesn't do a lot of puzzle games they were simple enough that I enjoyed them a lot. Like the stretchy man as well.
I did notice the lack of audio but it didn't anything away from the enjoyment of the game anyway. But it could probably help with setting the atmosphere.
I love the endless(?) mode at the end, being able to mess around with boxes is quite fun.
A really cool concept which I think can be expanded some more ideas and more puzzles.