From the developer:
"Blast away a variety of enemy aircraft, tanks, and anti-aircraft installations as you venture ever-deeper into enemy territory with your high-powered helicopter. Features spectacular, flowing 3D terrain. Encounter new enemy military hardware and upgrade your ship with powerful weapons and armor. The full version will enable you to encounter 13 new enemies, and explore many new levels. Post your high scores online and compete with others from around the world! Lots of gameplay in free download!"