If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
This village was quiet and peaceful place until a zombie invasion happened. There's only one survivor left, but luckily, this guy know how to handle all kinds of weapons. This guy is you! Get to the action and stop the invasion.
Left / right Arrow Keys - Move.
Down Arrow Key - Pickup weapon.
Spacebar - Shoot.