Excerpt: While no prizes will be won for name innovations, Tap Tap definitely deserves some props. Originally made to work on jailbroken iPods and iPhones, the developers have sensibly decided to offer it up in the new App Store. And for free as well. What you get here is most simply described as Guitar Hero for your phone, except there’s no guitar, or any famous songs (yet!).
Summary: Retro-flavored Gravity Crash looks like Asteroids or Robotron, but you'll battle the pull of gravity just as much as space aliens or enemy turrets. It's a game with sleek presentation, but it's rather brutal. Consider yourself warned.
Pros: Slick vector graphics, Lots of content for the price, Easy to use level creator
Cons: Often frustrating, Old-school shallowness, Many unimaginative levels