I was not expecting to rate this game as highly as I did, honestly. Like, I wasn't expecting it to be trash, but you got three fours and a five outta me, and I don't give those fives out easily. Actually, you might be the first to get one.
It's a game that does its small collection of things, but does them well. The game is stable, I didn't encounter more than one or two small pathing irregularities in the kids, and there's a good balance between my speed, the kids speed, and the rate at which they'll cause havoc. Honestly, your excellently in-universe tutorial probably clinched it for me though. Diagetic and informative!
That and you clearly have an insight into the daily struggles of a teacher. I swear, I'll never know how they get so many grenades.