Mobile gaming has changed quite a bit over the last few years. I think the main thing people notice is whether buttons are easy to tap and whether text stays readable without zooming in. Battery use and mobile data consumption can matter too, especially for anyone playing away from home. A site might look fine on one device but behave differently on another because of screen dimensions, browser settings, or connection quality. Personally, I think a comfortable mobile layout should make basic navigation straightforward without requiring much adjustment. It’s also sensible to set a time limit before playing, since using a phone makes it easy to lose track of how long you’ve been online.