It's another classic free play with all the variety you expect.  Starting off with Falsion, a Famicom Disk System game, you get a quality third gen style piece.  "Main Theme" from Metal Fangs for the Mega Drive is short but builds tension in a fantastic way.  "Credits" from the PC Engine game 1943 Kai is a total jam that will stick with you.  And that's just a taste of what to