This doesn't work, but I know a way for it to work. Look here Easy - click to listen to The Seven Seas Normal - click to listen to Viking Arena Hard - click to listen to Airborne Robots Harder - click to listen to He's a Pirate (F-777 Remake) Insane - Click to listen to Deadlocked Demon - click to listen to Sonic Blaster (Sonic Wave) While you are listening to one song, do not play another while it is playing. This will result in the 2 (or more) songs playing over each other. If you would like to listen to another song, just wait until the one you played first ends.
I downloaded 3 F - 777 songs.
