Escape From Zombies

You are a survivor of a zombie apocalypse and you're stuck in a building with a broken car and hordes of zombies are attacking in the lawn. But wait, you found tools enough to fix the car to escape from the hordes of zombies. ARE YOU READY FOR IT?
You are trying to fix the car while trying to defend yourself against hordes of zombies. Roll for success on each section. Any zombie that survived will attack the barricade. When you successfully killed 10 zombies you will be rewarded with power-up.