The thing about castle defense games is that they are frantic by necessity. There is zero depth to tossing enemies into the sky with your finger so that they splat on the ground. Most developers up the intensity by piling on more and more invaders so that the game becomes a test of your dexterity. Monster Mayhem piles on mechanics instead—giving you a full arsenal of weapons, giving you a full bestiary of creatures to take on, and giving your finger a much-needed rest. The shocking thing is that it totally works.