This is a kind of shooting game with gravity. Your cannon locates at center. By touching the screen, the canon heads toward that direction and shoots the ball in the direction. There are 4 enemy cannons, which shoot the smiley balls. Your mission is to hit the smiley balls. When the ball is shot upwards, it has downward gravity. If the ball is shot downwards, it has upward gravity. When the ball hits the edge of the wooden target, it bounces back. You have 60 seconds. Hit as many smiley balls as you can.
I wrote a blog about this game development.
Here, I wrote how I created this game.
If you have interests, please read my blog, as well.