You are locked in a vault while putting something in it for your wizard master, and you must find a way to escape.
Now I'm not the biggest fan of "escape the room" games, with so many on flash, I'd hate to see IF dedicated to it also, but this game more than makes up for it.
First of all, the game includes easter eggs to find, adding to replay value.
Second, the entire game is about figuring out magic words, and the syntax in which to use them, which is a great puzzle in itself. The puzzles are fair, they make sense, and they're great fun to play with.
That leads to number three. Once you figure out what's going on, there is plenty of fun screwing with everything, and anything you can see can be messed with. On top of that, the game understands so many nonsense commands with funny responses. This game will keep you entertained long after you actually completed it. (And FYI, completing the game does not give you the best score. Playing beforehand does!)