Really nice, takes the classic avoid the obstacles and adds a fun way to control the boat and very nice visuals. Makes you go "just one more try".
As the other commenter said, it's a bit difficult, but I think it's great as it is. One thing I'd like to see is maybe a pause screen when the game is over, so that I'd have time to register what my score is. Now it's a bit difficult to say what my score is. This would greatly increase my need to compete with who gets the greatest score among my friends :P