Guide not written yet. We add one after we've played the game. For now, this is the developer's own description.
About Downhill Car Ride Crash Test
Embrace chaotic fun as you propel dummies on scooters and bikes downhill, aiming for spectacular crashes. Perfect your timing to maximize speed and unleash destruction, earning rewards for damage and distance. Continuously upgrade vehicles and stats in a cycle of thrilling crashes and explosive mayhem.
Description supplied by the developer via GamePix.