I started to work with CryEngine Sandbox seven years ago. (damn, already 7 years?) I also work with Game Maker.
I've tried to compose a theme in Muse Score recently. I don't have a good sense for melody etc. so I'm not composer. Anyway I quite like this, so I've uploaded it here.
By the way, I'm making a small indie game, in case it will go out well, I'll probably use it as a theme for that game.