Woah... thanks for the physics explanation! It's great knowing little tidbits of information like these to avoid invoking the "Did not do the research" trope in your games, so knowing it's been great to learn something new, which will probably be helpful someday (or not, but it's still good to know anyway).
I'm an amateur composer with just a bit of musical knowledge, so I mostly stick to simple songs that don't require lots of instruments and/or arrangement, like NES-era chiptunes.
About five years ago, I started using MidiMaker (a very, very simple MIDI tracker) to try and compose stuff, but a few years later I switched over to DeamStation, which was more of a synthesizer/tracker. The guys who made it released the first version for free after they launched DreamStation2, so if you'd like to try it out, you can download it for free.
It's really hard to compose a song if you don't know some music theory, and hearing all kinds of music helps, too. However, it all comes down to whether you want to do this as a side hobby or develop it as your main skill. I chose the former, so most of the time I'm doing other stuff, and don't come up with new songs too often as a result.
The only thing I'd say I'm somewhat decent at regarding music is creating covers of songs I already know, which came in useful once when I covered a popular Argentine march for a politically-inspired game made by a friend of mine.
EDIT: Regarding my game, I've taken quite a few screenshots yesterday since I'll be needing them to submit it to the IGF tonight. I hope I'm able to add some polish in the scarce few hours I have left before the deadline, but at least the gameplay is already done.
As always, you can click on the thumbnails to load the full-sized images.
