This is my single greatest Minecraft build so far, both in size and complexity!

(Single player only!)
Short explanation: There's three doors in this game. One of them has a prize, the others have donkeys. You win by opening the door with the prize.

How to play
(Also explained in-game by the announcer):

1. Pick a door by flipping the lever in front of it. (This won't open the door yet, see step 4).
   
2. Watch the game open one of the two donkey doors. (This is never the door you picked).
   
3. Decide whether or not you want to switch doors.
   
4. Open one of the two still closed doors.
   

The reason I initially build this was to test the famous Monty Hall problem first-hand. This 'problem' states that in the situation described above, you're twice as likely to win when switching away from your initial choice. I could explain why, but there's other people who explained it better (link opens in new window) than I probably could.

Also, I still don't feel quite happy with the aesthetic, so expect future updates to this! That's also the reason for the 95% complete status below.