CryoSID

Here's the sound track from the game Pilot Polaris Rebellion, which is an extremely obscure game. https://www.dropbox.com/s/piq3yhuh8s98rre/Polaris%20Rebellion%20OST.rar?dl=1

No, but his laptop could be hooked up to one. I've never seen a laptop screen flickering though but it I guess it doesn't mean that his laptop doesn't do that.

Are you using a CRT screen? If so try increasing the refresh rate to a minimum of 75Hz (85Hz is recommended). You may have to decrease the resolution in smaller/older CRTs. If you aren't then I have no idea what might cause it.