I have created the entirety of Wolfenstein 3D! It has all the maps, including the secret floor, for Episode 1. Every surface is backed by obsidian to minimize damage from creepers. The secrets can be gotten to by digging through the walls. Everything is vanilla, but I will be working on a texture pack. When 1.4 comes out, I will be modifying the map for the use of command blocks. These will allow for smoother floor changes and level saving. In the place of treasure, I have ores to dig. These, and anything else you get, can be used to craft whatever you want. I recommend making pickaxes, swords, and armor. Some of the secret rooms have enchanting tables to boost your gear. It is a fully playable game within a game. The 'elevator' rooms have furnaces for smelting the ores you dig and a crafting table to make new stuff! When it comes to the final boss, you will need to assemble it before you fight it.

Don't forget to check out my other stuff!