"Shafted" a Minecraft challenge map

i am currently working on a challenge map that is based on the concept of portal's style test chambers but the chambers test the players knowledge of Minecraft. The course starts you off in the top of a long dark square "shaft, the objective is to reach the bottom. in order to do so you must navigate the obstical course lining the shaft that will occasionally take you into controller chambers that consist of a puzzle that tests your skills as a problem solver as well as your knowledge of the game. which a required to solve to continue down the main shaft. i am trying to make this map quiet a test to even very knowledgeable Minecraft players. Fortunately i am making the map available in a version that has signs throughout for hints and minimal instructions, and one with little to no hints and the signs that are there are very vague hints. Some of this map will require more understanding brain power, some of it will be pretty strait forward but requires reaction and timing skills.