Should I write a game for android using xml markup (layout)?

Question

Android

Good day.
They asked me to make a game, but in such a way that the customer himself, for each level, would create an xml file (layout), where the pictures, background, and different settings for displaying pictures are somehow located in their own way. With these pictures, then the user interacts (scaling, moving, hanging with sounds).
I have developed games using canvas, libgdx. It immediately turns out some kind of mixture of a game and a regular application.
I have not encountered this, I do not know what problems there may be due to such mixing. Is it worth it to do this?
PS is interested in c xml, other options are not suitable.

Answer 1

And what about the usual application? Your level file is simply stored in XML, and that's it. Or did the customer say to make the XML format strictly like layout in android? Even if so, who is stopping you from interpreting and displaying data in your own way on the same canvas?