У вашего броузера проблема в совместимости с HTML5
Enjoy the ride.
The world was made with FME 2015 from the dataset provided by the U.S. National Park Service.
The roller coaster was constructed by Slava Bagh.
More details about making Minecraft worlds with FME can be found here:
http://fmepedia.safe.com/articles/Samples_and_Demos/How-to-make-Minecraft-worlds