This is a modified version of Momentum Missile Mayhem
game. You need to destroy approaching enemy units using your cannon, but you don't just shoot them. You throw gravity missiles that do not destroy the units directly. Your missiles hit enemy tanks and bounce them. Tanks are destroyed when they hit the walls or each other, which means that a good shot can destroy several units. To launch a missile, click on your cannon and drag the mouse in the direction opposite to the shot. The farther you drag your mouse, the higher will be the missile's speed, but be careful not to drop your missile before you launch it.