Happy Gomoku app for iPhone and iPad

Gomoku is an abstract strategy board game. Also called Gobang or Five in a Row. The game is easy to learn, fun to play, but difficult to master. Black plays first, and players alternate in placing a stone of their color on an empty intersection on the board. The winner is the first player to get an unbroken row of five stones horizontally, vertically, or diagonally.
Happy Gomoku comes with carefully crafted artificial intelligence, Its difficult to beat the app. There are 4 levels of AI to play against the computer and 2 players mode as well.

Features
1. Four levels of AI, meeting needs of all players.
2. Two schemes of chess board.
3. Neat graphics and exciting sound effects.
4. Undo function
5. Finger-touch-offset function
6. Show the last move