6874 is a deceptively simple-looking escape room Flash game from Yomino Kagura. While the numbers in the title don't actually mean anything, it does hint towards the rather roundabout logic that will be needed in order to piece the clues together and get the combination needed to leave the room.
In this run, Spikestuff doesn't bother with any of the hard thinking, already knowing the combination, and leaves the room as fast as possible.