I absolutely know what you mean about just hearing a composition in the head... and especially that it just needs to be made. Thanks for making it, although this really wasn't much of an anything, I'd say. It is ambient, and actually kind of nice. For what it is supposed to be, I'd say you've found yourself some butterscotch. There's just not much TO it, and I think that you could layer it a little more with other instruments. Perhaps if this were going to some sort of game or video of some sort, I'd feel it better. Still, in technicality, this is fairly simple. Glad you got it out, though. I encourage you to keep doing that.
Kaeo