This is a simple game, but I'm not really sure how to categorize it. It's kind of a mix of rhythm, skill, and puzzle. It's definitely unique, and I enjoy playing it during down time. Basially, each level starts with a beat and fragments of notes will fall from the sky. You match togetehr similarlly colored fragments into a chain of up to 8 pieces, and then release the chain to gather points. However, the skill comes in as the notes are falling quickly and the chain isn't released instantly, so you need to time it out to make sure you don't lose the note fragments.
As the game goes on and you gather more fragments you gain "notes" that change the song of the level, slowly climaxing until the entire song is revealed, which I found to be quite well done.
As said, it's deceptively simple, easy to pick up, hard to master, and a lot of fun for down-time gaming. It's not something you can play constantly for weeks on end, but as far as a "puzzle" game or other little skill game that sits in your library where you pick it up every once in awhile AVSEQ certainly fits the bill. I would recommend any type of gamer to pick it up if you're looking for something to break the monotony every once in awhile.