This is a short demo video of the Monster Mayhem game for the iPhone. Here you to take on the role of a Gate Keeper of a graveyard, who's job is to attack anything that moves towards the gate in order to stop it from getting free. The game features 20 unique monsters and 8 bosses across 30 stages. There are also 7 different weapons, each having 4 levels of upgradability. Reminds me of Plants vs. Zombies a bit. Watch the demo below.