Anyone figure out on how to login through ur phone? Cuz I had it load up on mine but was unable to type in my credentials... but seems like it would work if I could lol
If you put the cursor into a field, which allows text input, the application has to tell the phone/tablet, that it should bring up the on-screen keyboard.
If it is a regular website, it uses standardized text input, which already has this functionality built in, so the web developer doesn't have to take care of it.
Same goes for native basic android/apple apps, which most of the time are built with a framework, which has all the necessary functionality built in.
Games on the other hand, be it running native on the device or in a browser, often have their own user controls built, which means the developer has to take care of signalling the phone/tablet, that text input is required. Apparently ClassicUO devs didn't cover that.
You could make it work, if it is somehow possible to manually bring up the on-screen keyboard. But then, if they didn't even take care of basic text input, they for sure haven't taken care of movement. Usually you move with holding down the right mouse button (of double-right-click for pathfinding). And right-clicking is not really possible with a device with touch screen only. So I'm pretty sure, that would be your next blocker.
I would definitely give playing UO on a phone/tablet a shot and a web client would be very nice for that, but a lot of development has to be put in, to make it usable. I doubt that it will happen...