Your goal is to defend the ground from enemy's paratroopers and stay alive.

Paratroopers are carried by helicopters, as three paratroopers land to the same place they're able to destroy your cannon.

Sometimes enemy's airplanes throw bombs onto your cannon; hit them to avoid a defeat.

You have the gun and two missiles (more added as you get higher score). Missile has a wider hit range but it requires you to explode it (by default, push Up button to launch a missile and Down to explode it).

Wind changes often, be careful!