I made a few improvements to it to use on LAN server so people don't cheat. I added nether fence around the bottom instead so people can't just hop and skip half the course, and one of the ice blocks melted from the lava below so I replaced that one with diamond block, than even out the lava so it doesn't flow and put and iron door so you can't get back in the room and than put a wood door on the outside to get in the building course.

oh yay parkour so original and not boring and not already overdone a million times :p <3