Crowd Defense is a tower defense puzzle game. With a heavy machine gun and a cannon, you need to eliminate all incoming enemy units before they get close to your castle. Your weapon has limited ammo and reloading speed.
Remove all cards and reveal the three towers. You can remove cards from the game by clicking on cards that are 1 higher or 1 lower in value than the open card at the bottom. Click on the closed stack to get a new open card.
Click on groups of 3 or more of the same rune items to remove those. Remove all grey backgrounds and/or drop down the coins and reach the indicated goal.