I don't know how a game can be frustrating, yet so simple at the same time.
I'm not sure if it's possible to lose in this game, but the biggest enemy is the stylus control. A novel idea, but frustrating when it doesn't work. It's too jerky especially when you try connect pieces diagonally.
Seems like the only way to get game over is when you get sick and tired of the stupid stylus controls and get bored.