Zombies!

Description of Zombies!

Zombie has occupied your own building.
Solve the puzzle and try for the top floor!
First, you'll defeat the zombies with things around yourself, like a kitchen kife.
The uppper floor you go, the zombies become stronger.
Make your health and weapons more powerful with crystals and coins which you can get in the game.
Crystals:
Crystals require payment but you can get some crystals in game!
You can change crystals to coins or your life points.
You can continued if the game is over.
Coins:
You can change crystals to coins and get when you complete the floor.
You can buy weapons with coins.