We need a hero!

The planet is in peril! Aliens from the far reaches of space are invading, and only Bullet Boy can stop them! This action-packed shooter casts you in the role of Bullet Boy, brave defender with a home-made anti-alien blaster tank. Rip enemy alien ships apart with dual repeating cannons and revel in a constant rain of wreckage as you fight to protect your town!

Grab upgrades and blaze away with ship shattering glee through five introductory levels, collect bullet points and unlock 15 more levels of furious alien assault. Unlock Bullet Girl and disintegrate alien formations with mighty nukes. Confront the alien mother ship in a final deadly confrontation. Show the invaders this planet isn’t theirs to take!

Features:
- Five free levels of alien blasting carnage
- Fifteen additional levels including a final boss battle in the unlocked version
- Powerful weapon upgrades and mighty nukes to help tear through endless waves of invaders
- Unique enemy ships with crafty and dangerous abilities to rattle your nerves and test your skill
- Unlock and play as Bullet Girl
- Game Center Achievements
- Built for iPhone, iPod and iPad devices
- Compatible with iOS 3.02+

Source: http://itunes.apple.com/us/app/bullet-boy/id410056242?mt=8