Made by me. Yes, I do love Gravity Falls. :)
Original song: http://youtu.be/Z6usKhzL8uI
Art by ponyPharmacist: http://fav.me/d5ehz4h

My Tumblr:  http://lenichbrony.tumblr.com/post/29855013063/gravity-falls-8bit

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MP3: http://www.mediafire.com/?e4fne1xe33nxfev
FLAC: http://www.mediafire.com/?3v8ud2zste8g18m

I also recommend this awesome song by Ken Ashcorp:
http://youtu.be/rm7bTvTtXJg