Beheading Zombies

Beheading zombies is a funny game where you must prevent the zombies from entering the city beheading them with a ninja star.
To launch the star you just have to push it with your finger.

You must protect the innocent people who go into the city to escape the zombies.
Be careful because if you cut the head of an innocent by mistake or a zombie catches a innocent you will lose one brain.
You can bounce the star against the wall to avoid the innocent.

You will also lose a brain if a zombie gets inside the city.

Initially you have three brains, if you run out brains its game over .
Occasionally appearing balls with letters that change, you should try to make the word "BRAIN" for extra brain.
If you get thousand points will also get an extra brain.