This was pretty fun! Not particularly believable, but that doesn't matter. The puzzles flowed logically, so I think you did a really good job of making things easy to understand how to solve, without obviously just giving away the answer.
The only thing I'm not a fan of is the ending. Depends how long you were planning to make that scene, but reading text against a moving background can easily make people feel motion sick, so it's usually something to avoid.
There was a typo on the second line, it should be 'the adults WERE too busy'. Other than that, good job! Looking forward to seeing what's in store for the future :)