Go to the Cove, click on the surf hut on your right and your penguin will waddle to it.
As of now, there are four modes that you can play, Surf Lesson, Freestyle, Competition and Survival. In the past, you could play all the levels but since stamps for it arrived, Surf Lesson and Freestyle are for non members while the other two are for members only.
You can bring your red puffle into the game, there is also a catalog of surfboards, you can click the pink surfboard to find it or click the bottom right of your screen.
Both of them are for members and worth 400 coins. Surfs up! :)
Instructions: Basically, you just have to control the speed of your penguin by using the mouse, going up and down, you can also do tricks by using W, A, S, D .