The wild symbol is the treasure chest, which replaces all other simple figures. Incidentally, the treasure chest is the scatter figure and, if three or more of them make an appearance, begins the Bonus game.
During the Bonus game, a random number of Free games are awarded to the user and a random figure is selected as the Golden symbol. While the Free games are played, the Golden symbols expands along it's reels and give all available prizes if it does appear in enough reels regardless of reel position.
Use the trophy button and you will see the Paytable, the "?" button shows the help pages and the mute button silences the game.