Halfbrick, the makers of Fruit Ninja and Monster Dash, have a new game coming out soon called Machine Gun Jetpack. We looked at it earlier this year in a hands-on preview, but now the developers have released a developer diary that nicely illustrates the game mechanics.
When we looked at the game in March, it seemed highly polished, with great graphics, simple gameplay, and responsive controls. But what really made us want to keep playing was the upgrade system, which seems to tap directly into the addiction centers of the brain. Machine Gun Jetpack should be hitting the App Store with in the next couple of months.