first off. if you are going to use this on a server you will need to set the command blocks at the end to what you want to have as the reward for completing this challenge!. second make it so no command will be able to be used in the maze. that makes it a challange. no tp. no f home. no teleporting out of there in any way..... and dont forget to change all the spawners to hostile mobs if they dont spawn hostile!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
test it out if you like on geecraft.akliz.net at /warp epicmaze