Thanks for the ideas. This is one part of the project I haven't started work on, yet. I might need to do horizontal scrolling, but I'll avoid it if possible. I like having everything on screen, unless it gets too crowded.

I've been working on a little game recently, so I haven't done much work on the music engine. Soon though, this game should be good enough to require music/sfx - I'll have even more motivation to get it working (and more coding experience, heheh).