pon1 is just a sped up version of the music that plays in the red-and-blue-pill area after the Music World. Slow the music down to x50, it will be the same.
Thanks for pointing them out.
It's unfortunate that their speed has been altered ingame, though. They are much more creepy when played normally…
Does anyone remember where bgm23 is played?
That track is a sped-up version of the music that plays in Microscopic World/Fog World after interacting with one of the microorganisms.http://dotflow.wikidot.com/fog-world
Actually, that's bgm22. bgm23 is an unused, higher quality version of bgm22.