This is actually a surprisingly good game. The track design is very nice. There's an array of cars and drivers, which you select separately. Each car and driver has their own stats, and they add together for some customization. Each car has a different paint-job depending on the driver as well.
The game's main gimmick is heat. There's a strong risk-vs-reward element, and it's all about managing heat. When your car overheats, it blows up. When you use boost, your heat gauge rises. As you boost you also cause one of a few flame effects, depending on your car. Some cars leave a trail of flame when boosting, some have a ring of fire, etc. These are your weapons, since any opponents caught in your flames take on more heat themselves.
Any water on the track will cool you down if you drive through it, be it blue water barrels, puddles, waterfalls, or skimming the surf.
No idea how well multiplayer works, haven't seen anyone online to try it with.
I can see this becoming a sleeper hit.