Thanks so much for the feedback, everyone!
Your suggestions are really helpful. You're right, increpare, it would be beneficial to add more instruments. I seem to have trouble putting in new parts that actually
mean something, and don't sound thrown in for the hell of it.
Kobel, I totally see where you're coming from. Listening to it again, it really sounds like it needs some "spicing up."
To address a point that nobody's brought up: my main problem right now is the length of the piece. For a song in a game, it seems about the right length to cut together and loop, but nothing bothers me more in a game soundtrack than a short music loop. I think the guitar/lute idea is a good potential solution, but most of what I'll be doing now is trying to extend it.
Oh, and joshg... thanks!