Right now I do very little adjustment for the mobile version but an easy fix is the following:
1. First move the order of the fields to make the thumb field 2nd to be displayed, underneath the title. The desktop version uses absolute positioning so the stacking order is irrelevant for desktop.
2. Update responsive.css to disable abs positioning when viewing in mobile view and have everything just stack vertically. It will look good that way.
3. Apply for M&M theme as well