Nitro fills only when you shave past traffic, and the margin decides the payout - the closer you pass, the more you get. There is no other source, so a cautious line will leave you with an empty tank.

Chaining shaves builds a multiplier. When it reaches 6x you enter REDLINE, where all income doubles. It is the highest-scoring state in the game and the least forgiving one, because any crash breaks the chain instantly.

Each of the four cars suits a different driver. The Vulcan has a huge top speed but steers lazily, so commit to lines early. The Mantis turns very sharply but wanders on the straights. The Warden is the durable one - the best pick while you are still learning the sectors.

Yes. Coins, unlocked cars, upgrades, contracts and your best distance are stored in your browser automatically, so you pick up exactly where you left off.