As others have said: this is overall a very good game with amazing graphics, and the only thing that seems a little off is the fact that the three characters each essentially go through their levels independently without really interacting. Of course it's hard to complain about not having that degree of intricacy to level designs when the game was made in two weeks for a gamejam after all.
At one point I couldn't figure out what I was supposed to do and I stopped playing (I needed to take a break from playing these gamejam games anyway), but I came back to the game later on and found that pressing H brought up a screen that clued me in. I guess construct 3 is locked now that the jam is over, but even if so, maybe you could mention the game controls including H key in the author comments.