I've been building up spare keys for a while, and the autojoiners are suspended right now, so it seems like a good time for a big dump.

This game is an RPG Maker math puzzle game. Yes, really. It's not great, but I enjoy RPG Maker stuff and it was unique enough that I finished it. If you're curious how you could possibly make a math puzzle game in RPG Maker, check this game out. If RPG Maker makes you cringe by reflex, stay away.