Oh my gosh, PHUNGL, you are awesome! Your idea for "materialName" setting just banged in my head for my next marble race! Thanks a lot (and sorry for stealing your idea).
No, no and no! Water cannot be set to be immortal. But, the maze generator's interface is the killer! You really need to improve the generator that the maze disappears after pressing Return (Enter on the keyboard, not numpad).
EDIT - Ooooooh, the killer is the box for explanation!
MarbleRaced - It generates enough power (for me) to make a car move for 2 m/s.
theracer5000- It's not the moving block! It is an automatic spring ENGINE. Not a moving block.