I vote yes
I say upload the extended version. You could keep this on here too. Having more than one version of a song uploaded is something a lot of authors do. That said, this is pretty awesome. I've never played the game, but I definitely dig the haunting music box melody, the bass and drums go well, heck all the instruments do. They really add to the haunting feeling. It also loop very well. Excellent piece, I'd love to hear this extended version you speak of.