Rules:

Play on any difficulty, but if you play easy or above, mind creeper explosions, because they could seriously damage things!

Do not use mods or cheat.

Do not craft anything.

You may only break clay. (You can also break spawners if you want).

Do not place anything except for levers/buttons on iron blocks and torches.

In the shops, do not steal. Pay the specified price.

Collect as many diamonds as you can. There are 15 in total.

Most importantly, have fun!