Turns out we can (in iOS for now) even play the Music in the background while playing RR3! (or surfing your favorite blog )
MRR Music Box -
You can search in YouTube for "MRR Music Box" or paste the link into your browser.
Please keep filling the Music Box topic, and let's use this one to discuss the tips to use the playlists.
Songs are grouped into 8 categories, while the main playlist gathers ALL songs included the sub-playlists (I went through the initial 1/3 of the Music topic, more to follow).
Next step: pick decent cover images for each playlist!