iBomber

Taking out certain targets, on occasion, releases power-ups - health packs and different types of bombs. However, unlike in the iPhone release, these seem to equip automatically, requiring no action to be taken. Another hint is - Don't go too slow. Though it's tempting to turn things down a notch on your first run through, by doing so you make yourself a sitting target.

It's easy to miss the health packs or bombs you can unlock, but i've found turning the screen brightness to max makes them a lot easier to see.