Zombies

Zombies!!! Fuuu...

Quick shoot them with guns!

I'm out of ammo! Grab a clip - shoot more zombies!

Arrgh the zombies are getting stronger! Quick grab money - buy better guns - shoot zombies!!

But the doors are locked fuu! Grab a key to open it!

There are no keys left! Then you wasted them on the wrong doors you fool!

Phew I've found some stairs to escape... wait a minute more zombies!! AARRGGGHH!

At last I've climbed 10 floors and reached the top.. Hang on WTF!!!!