Demolish Derby is a car-wrecking arena game: everyone drives, everyone rams, and the last car still moving wins. Hitting with your front does damage; being hit in the side or rear costs you.
The tactic follows directly from that: you want head-on and T-bone impacts, and you want to avoid presenting your own flank. Unlocked skins accumulate in the garage as you win.
Hit opponents front-first and never let them hit your side or rear. Backing into a wall while you pick a target removes half the angles they can attack from.
Yes — winning unlocks skins and vehicles in the garage.
Yes — drag to steer. Nothing to install.