This is a shooting game. There are 12 stages to be completed. By touching buttons(left, right, up, down) at bottom of the screen, the dorphin(your ship) gets moved accordingly. If the dorphin is hit by a bullet, you lose. If a dorphin survives for 60 seconds, you win. Good luck!!
I write a blog.(Have a cup of coffee? http://try.candypop.jp/nice) I wrote about this game development in the following articles.
(http://try.candypop.jp/nice/blog/android/shooting-game-updated/)
(http://try.candypop.jp/nice/blog/android/shooting-game/) If you have interests how I developed this game, please read my blog, as well.