If you actually paid any attention to what the developer said, you would know that the game is meant to have bad design intentionally. Classic is fairly easy to beat once you know where everything is in the school, and honestly, after a while, you become numb to the horror elements. Overall I think it's more difficult than the full game considering the speed of the Principal and Gotta Sweep. But yeah a strategy is crucial for beating this game. Good luck with getting the secret ending though, that is an actual challenge. Also if you're letting your kids play it then you've obviously ignored the warning screen. So please read it before you play.