When I logged into a world where too many people were farming the same place, I sighed once I realized I had to change into some other world. But it had been as straightforward as opening the same tab as I did each time prior to on my PC. The UI is smartly split up where you tap one tab to start it and tap it again to close it.
My only issue with the UI is your chat display. Having it at the upper left corner is still something which I am not utilised to. It surely takes up a fantastic portion of the screen and it got particularly annoying when attempting to select something northwest of my current site. Thankfully, it is easy (but maybe not well-explained) to minimize but still an odd option.
The way that I've always played with the game (typically in bursts) feels right at home on my telephone and is a great way to pass time on the go.
You may have discovered, but recently I've been on a small Runescape hype. Particularly Old Runescape. It has been quite a while since I've played with it, but I remember how much fun I had all the same. Using its release on cellular, I'm happy to say that when you've played with RuneScape, everything just slides into place. Gotta enjoy muscle memory.