OVERWORLD THEME LENGTH

Program: General (Any RM)

Problem:
I was looking for a good piece to use as the overworld theme to my game Gio: Eras before I try to compose my own, and I found this really nice one after seeing the film it's from...but I fear that it may be too short and would make the player grow tired of it.

Here it is. It's an orchestral arrangement from a song in Princess Mononoke. Those of you who have seen it may recognize it:

Link

Apart from the question of should I use this at all, is this an appropriate length for an overworld theme? I'm still working on making it loop smoothly via audacity.