When started click the shop button to buy gun guys. To get them on the stage click them in the shop and click on the stage to place them down. If you don't want to place one down click on the door and you will get your money back. When you do so and are ready to battle against enemies click the circle with the triangle/start wave button and there will be some cars. Your gun guys will shoot them down if in range. You can view their range by clicking on them and clicking anywhere on the screen to hide them. If a car makes it to the end of the road alive you lose a life. When you lose all lives you lose the game. There are infinite waves. The game is mobile-friendly. You can see the stats for the gun guys if you hover over them in the shop. Also, you can't place gun guys until there are no more enemies on the screen.
Updates: v1.1 (21. Feb. 2022) Added fast and strong enemy and Sniper Sam. v1.2 (8. May 2022) Added world's high score and yellow car.