Ice Resurfacer Sim

Hi guys,
I am relatively new to Blender as I coming from 3Ds Max. My first main project is an
Ice Resurfacer simulation. Many of you may know this as a Zamboni. Here is a link for those of you who don’t:
I have the machine modeled but am wondering how to achieve the goal of the game. I do not know how to use the ice of the rink as the environment instead of the entire plain. I do not know if this is desriptive enough. I cannot share a .blend because of copyright laws of Zamboni Ice Resurfacers. Any help is appreciated.