So I grabbed the boys on the first leve, and I turned left to head home. Then I discovered that I couldn't enter, and I thought "Aha, I probably have to take them left, like in most platformers!"
So, I turn around, start heading right, jump over the first tutorial ledge, and everyone else stands there because they can't jump. The level is now unbeatable, with no way to restart.
EDIT: Wow, most devs don't bother to actually react to feedback! Just that on its own would have bumped up the score, but the puzzles turned out to be pretty fun. My only complaint now is that there isn't more of it! Keep up the good work!