The Survival Cube

Survive in a cube full of resources.

There are 3 cubes for you to survive.

There are hostile mobs and a staircase for them.

A hall of valuables for you to insert valuables in order to complete the map.

Full description in the Minecraft Forum Thread.

P.S. You may find a pledge saying I will make a sequel if it reach 10000 downloads. As this is the CURSE network, I will lower it to 100.