I liked the existing opening theme =D (or what little there is of it =9)
Also - consider contacting the Wesnoth community (I don't want to be promoting another game here, so please Google on your own if interested =) ). They have awesome, awesome music, and everything is copylefted (you would still want to ask first though; I am pretty sure Wesnoth is 100% copylefted, but the other game started by the Wesnoth guys is open-source with proprietary graphics and sound)
http://youtu.be/b-7CAtZr7Q0 (
http://youtu.be/b-7CAtZr7Q0)
I also have a feeling quite a number of Wesnoth players may be interested in Elements ^.~
