You can only buy silver coins at certain times. They usual send you an email for what the days you can buy extra spins with silver coins. When you click on a level to play it, it gives you the choice to select power ups like rockets, spy glass, autodauber and spins. Click on the spins and instead of gold coins , it will show silver coins for that day only. During the game, at the bottom you can buy jokers and things. Sorry, I just now received notice that someone commented. Talk about late!