Minecraft game : Diamond drop

Hi guys, this is the game I've just made using redstone :

Rules : All the diamonds need to be on the gate before confirming the answer
Instructions : To answer to a question, place the diamonds where you think the answer is, you can choose multiple answes but there's only one solution.
There's a series of 11 questions that are fully configurable using a memory array.
The system can be reseted at all time when the gates are open.
Lost diamonds can be found in the recyclable section of the map.

Download : http://www.mediafire.com/?ihfrymc1o0iaa3r