Players assume the role of defenders tasked with protecting the city from waves of incoming enemies. The objective is to strategically position defensive systems, such as turrets and bases, to maximize the effectiveness of each placement. As the game progresses, the challenge increases with the addition of more complex enemy types and increased difficulty levels. The game runs directly in a web browser, without the need for a download or registration. Players must carefully plan and execute their defenses to successfully hold off the incoming threats and emerge victorious.