The game uses DEM data and OSM maps to generate in a worker: 3D roads, intersections and tunnels. Everything is created in real time around you as you drive. The link takes you straight to a high speed race on a motorway in France. You can create your own races anywhere in the world and share the link with your friends. Press X to reset the car, long press X to return to the road. Press J for Nitro and long press to jump with the car.

It is completely understandable that it can't work in a mobile browser, but then, there should be a video demo showcasing the project.