I've no idea if this helps (don't even understand the game), but this is what I get from the audio:
[Taaa][Taaa][Taaa] [Taaa][TaTa][TaTa][TaTa] [Taaa][Taaa]
Taaa's just represent the sound btw, and a space a small delay between the keypresses.
So, 4xlong, 3xRapid double, 2xlong. No idea what it has to do with 'S' though.
I guess you guys will figure out
Edit:
[10:51 PM] Mystery Boot :
[10:50 PM] Mystery Boot : Oh I'm bored. Let me confuse you with an additional clue.
http://imgur.com/ttCi7
Edit2:
[11:00 PM] Mystery Boot : By the way that image is special. Now I'm out of food to spoon feed you with. Tough luck.
[10:59 PM] Mystery Boot : Do I have to spoon feed you guys? That would be like handing myself a stick of TNT and helping to light the fuse. Which I will not do since I look forward to your impending destruction. Really Meatball? Is this all they can do? I should have given them a 2 weeks limit. The "path" is right under their nose and they don't know it ...
Edit3:
This link was in the pic
http://pastebin.com/jf63fJ1V . pastebin.com is down for me right now, so can't check it.