It is a good bowling game on its own. Swiping to curve the ball is too sensitive and gutters too easily. The graphics are sharp and has a really good frame rate on iPhone 5. Even the alleys are very detailed, I think the color palette is a bit gloomy and dull, though. Also, the lanes can use a bit more ambient music and noises. It is too quiet and almost feels like it is haunted. Waiting for good news on the next update.
Cheuk Seto about Kingpin Lanes