You get a limited amount of money to buy traps, bombs, turrets and walls and place them in optimal positions to defend against enemies trying to harm your curious little kitten Mimi who, for some reason, keeps wandering into an array of sinister dungeons and graveyards. Any less than optimal defensive plan, or any small mistake in executing it will lead to the death of your kitten. Given your budget for a level, you need to carefully think what objects to buy and carefully plan the exact spots where you place each object.