The Scouting Challenge Theme is not 'responsive'. It is, however, perfectly usable on even a small mobile screen especially if you rotate the screen to a landscape orientation. This is because it was based on a theme that used a fixed width layout that had been correctly sized to be sympathetic to mobile devices.
The pan and zoom capabilities of mobile web browsers work well with this theme.
Is there any intention to make it responsive? Sorry, no. It is not something I have any interest in whatsoever. I generally don't like responsive sites. If anything, I prefer sites to look the same on any size screen.