Roadkill Mayhem is a limited-time event. When it is live, you will see the icon in the main lobby.
The timer indicates how long this event will last. If you see items you want in the Roadkill Mayhem Exchange, be sure to get them before the event ends!
Tap VROOM! to start the round. On the VROOM! button, you will see the counter that indicates how many tickets you have for the day; in this image, you have 2 tickets remaining and have already played one. When you have 0/3 remaining, you must wait until tomorrow to play again.
To play Roadkill Mayhem, use your finger to direct the car. Aim at zombies and fuel cans; avoid barriers. The more zombies you hit, the higher your score! Fuel cans extend the time so you can drive longer. Crashes lower your score.
As you increase your VIP level in Undead World: Hero Survival, you unlock additional car options. The bigger the car, the more zombies you can hit with it!