So I had an idea for people that want to make mazes etc or just have this weird house... A very special block that moves on a timer, it would be specially for creative and all this would be is a block that moves left/right/up/down/back/forwards on a timer (like chunk rental timer only used for moving not deleting) and it could get a random position (maybe mess with survival code for mobs and loot drops since that gets random stuff).
It would basically be ice block or something with a deeper blue (and maybe arrows on all sides that light up when it moves?) When you place it the block would start moving, a small box would pop up with the line (in your chunk rental only) where the block would move, after it reaches the end, if no further turns etc are given then it would move up, if there was nowhere for it to move it would stay still. So a panel where you can choose where to move it, how far to move it, and maybe even the time you need to wait to move it? And maybe allow blocks to be attached to each other?
This will probably cause big lags, so I don't know if it will be accepted. But it's something cool and new! There's not much fun mini games on creative, in fact.... There's none since slime is more a cool block than a mini game.... So this might kick it off and get people thinking of other awesome mini game things like a spin the bottle one where you can invite players and spin a bottle (or pointer). 
Hope you like it!