Cool game. There is not much variety of puzzles and they mostly repeat. Maybe you could have added a  button that cycles the player sizes in the opposite direction so the player does not have to click the same button three times if they accidentally clicked it.

I felt like the levels didn't really have enough challenge to them, but the mechanic is cool!

I liked the level design, I appreciated that levels seemed to loop around back to the goal, rather than making me backtrack. I did feel that the obstacles weren't challenging because I could change size at any time. It would have been interesting if the player needed to reach some position first before gaining access to a new size, or if there were obstacles that would allow the player to pass through, but they would block the variously sized boxes you needed to carry. I also liked the music selection, not sure if one of you composed it.

It's a cool game ! Straightforward and with good level design ^^ My time :

Nice game, i like the idea. The puzzles become a bit straight forward once you got the mechanics down, but i still enjoyed it. I beat it in 5 mins, hope thats a good time :D