Sound effects have been added to World of Solitaire!
To turn them, click the "Options" button at the top and then go to the "Settings" tab.
I couldn't decide on exactly which sound effects I liked better, so you have two styles to choose from: "Gentle" and "Robust"
Gentle has nice and soft sounding effects and are a bit on the quiet side. Whereas Robust is more prominent and moving the cards around feels very significant. You can choose whichever you prefer!
Sound has been #1 most requested feature over the past 10 years and I'm glad to have finally gotten it into the game for you all to enjoy!