Work on your tan as you run around and collect pirate booty on an abandoned island.
The island is procedurally generated so there are literally billions of variations.
Use WASD (or your locale's equivalent) to move. Use the mouse's scroll wheel to adjust the camera's distance to the player.
Use the Tab key while playing to access the Pause Menu. From there you can access the Settings Menu.
The M key will toggle the map and the < > keys will change its size.