You're the last surviving apprentice of Sorth, dark lord of Castle CantSayTheNameOrIHaveToDie. Tasked with the simple job of cleaning up the library, it seems you've accidentally dropped the Dark Grimoires of Sorth to the ground and now all the banished creatures have escaped. Oops! Hey, when a Denny's waiter so much as drops a plate they're "Now Hiring!" so this loosing-magickal-monstrosities-upon-the-earth business is something you should definitely sort out immediately if not sooner. It's sliding puzzle madness as you race to beat the clock corralling magickal beasties in paperclip studios' Castle Keeper.
Fortunately, herding these cute abominations around by the nose is a snap. Your [arrow] keys control a reticule that you can pick them up with using the [spacebar], giving it a feel similar to Orbox and making Castle Keeper the first game ever to play like one of those claw-grab vending machine games with massive arcane creatures of destruction in place of smiling Hello Kitty plushies. When you've selected your critter you can guide it with the [arrow] keys, and it'll shuffle off docilely in that direction until it hits an obstacle. The idea is to get them over to the glyph on the ground that matches their own color, at which point you can release them with the [spacebar] and they'll be replaced by an innocent-looking grimoire matching their hue. (Why do we even keep these tomes laying around, anyway? Seriously.) You'll need to pen these adorable homewreckers before the timer runs out, though snagging hearts and pocket-watches will grant you another try, or more time to track them down. Puzzle fans will find this one both frenetic and tough, and with over fifty levels of behemoths rampaging within the stone walls there's plenty of castle left to save.