Well if you look at the screenshot, its at the end of the day just a screenshot of a dirt track in an arena. Aside from the cross roads on the track, there's not really much 'IP' there that can be copyrighted. It's hard to copyright 'parts' of a track, but certain official racing arenas such as Silverstone etc, have their design copyrighted, and you need rights to use the track design in your game.
Regarding IP infringements, the actual game though is played in a totally different view using a chase camera.
If the camera was behind the truck instead of an isometric view, then the game starts to look like Monster Truck Madness