Ok, so I still don't know if this was America's substitute for Puyo Puyo. This was my very first puzzle game I played ever in my life. I remember vividly playing this for hours on Sonic Mega Collection+, both the GameGear version and the Genesis version. It was really fun learning this game and Puyo in general, because back then I never heard about Puyo Puyo until Nintendo released Tsu on NSO.