Ok, I guess I can kinda see where you're goin with the whole "I gotta make sure you're into it to get music that fits" thing, but wouldn't make a lot more sense to drop the test thing? Isn't that a bit extreme? First off, you'd get about 90% more support for your project. After that, you could sift through the songs you get and find ones that fit. Obviously, the people that have read the script will probably have the most fitting ones so what do you have to worry about? People who are interested will read the script. Almost all of those people won't want to bother with a 50 question test.
Also, if this does get turned into an anime, I assume the composers will catch a cut of the profit from that as well?