They usually work fine but the biggest issue is naturally text size and not being able to see the images behind it as android devices are smaller than a PC so it could be harder to read the text.
There is a button in the star menu to hide the interface, this may help with the first problem. And I can add text size settings, I think the problem depends on the screen DPI, the text is perfectly readable on my phone.
That would be a cool option or something to possible make the text bolder so it's more visible compared to say lighter backgrounds which might make the text harder to see?
Can you show me a screenshot with text that is difficult to read because of the light background? I think the background of the textbox is quite dark and opaque.