Listening to Mystical Ninja & Dragon Quest's soundtracks

This morning I was listening to the Mystical Ninja 2 Starring Goemon soundtrack but after a while I felt a bit queasy. It's a great soundtrack but I guess I wasn't used to listening to it. I then switched over to listening to the GBC version of Dragon Quest 1's soundtrack and my queasiness was gone. I've heard of the game being therapeutic but not necessarily the music by itself!