On desktop browsers and in our Steam apps, it’s a cross-fade effect. In mobile browsers, (iOS Safari and Android Chrome) the next page slides in. You can also see the sliding effect in our native Android app. (Our native iOS app has always had a “page curl” effect; that remains the same.)
If you don’t like the animation, you can use the Settings menu to turn it off.
Also, on iOS and Android, you can now slide your finger on an option to select it. It’s faster than tapping an option, scrolling down, and tapping Next.
Let us know if you encounter problems with the new animations. Assuming we don’t see issues/complaints, we’ll start rolling this out to more of our games over time.