Very nice. Reminds me of an old atari game where you'd shoot up asteroids. Everything makes my ears feel nice lol. I love the little end bit, are you expanding that into another song?
edit:
oh, I see it now. I love those kinda details within songs. It's akin to, in game dev, extending scenes like the backs of buildings or terrain which the player will never see just to make the game feel more complete. Ig what I'm trying to say is it's not just the illusion of fully alive, it is fully alive :p