Research - Finding a song

I would like a song to play when the user plays this game.

The song can't be something which distracts the user, but instead creates an atmosphere for the game.

I've searched around and there's two songs which stand out to me.

Song Name	Description	Link
Fall Of The Awakened	This song creates a very good atmosphere and sounds like a song which would be used for problem solving in games with puzzles. This will work very well with my game. However the song changes at 1:20 and becomes much more upbeat - which will not work with the game I am creating. Since, if used, the duration would just be 1:20 this is too short for a game like mine. If set on a loop in Flash, it wouldn't work well as there would be a clear indication where it begins and ends.	/audio/listen/573019
Let It Go (Short)	This song has an entirely different atmosphere. It does not so much represent a problem solving puzzle vibe but more so gives an impression that all is not right. Which would work well with my game as there is a character to is lost and has trouble finding out where he is and who he is.	/audio/listen/566042

Out of the two, I believe Let It Go would be best suited  for this. Mainly because it's good throughout and the loop works perfectly. Loops are particularly important with games.