Nice gameplay design and concepts. The puzzles felt a little bit too easy, wish there was more of them.
I have mentioned this to a few other games but I wish you went with a system where you can switch between controlling the two characters, that way you can use the same control scheme for both characters which makes it less confusing to control them.
A couple of visual issues I noticed. First the characters were not on the same level, not sure if that was intended or not?
Second it seems like the layers might have been mixed as one of them would appear on top and the other under the tall object.
One last thing I was not sure if I finshed the game or not when I reached this area as I could not move forward?
Overall nice job. Keep on developing :)