It works perfectly fine for me on mobile, I have to scroll a bit more because it seems to be designed for desktop usage but since this recent update, I also enjoy playing it on mobile.

And regarding your other question: I have nevered measured it, so I am totally not sure about it. I think, 500 satoshi per hour can be possible, you need to be a bit lucky for that and kill other players, but then it should be possible. If they enable their weekly competitions again, you can win I think over 20k satoshi. This is were I earned the most.