Upon winning the key, Parzival discovers that Art3mis has also discovered the tomb on her own, though she’d lost the game of Joust and so had been returning to try again.
Upon reaching the end of the tomb, he must face a demilich in a best two out of three matches game of the arcade game Joust.
When the movie opens the location of the copper key has already been located by some other Gunter, but in order to obtain it, you have to win a race with some pretty impressive obstacles.