I LOVE this game, it's one of my all time favorite games!
The gameplay concept is so clever and innovative that I wonder why nobody based a different game on it... as far as I know, only a Touhou game (Phantasmagoria of Flower View) did it and nothing else.
Anyway, I had a chance to play the PS2 version, and I didn't like it as the original... I had the impression that they made it slower and less competitive/more random... in other words they casualized it. Maybe it's just my impression, and it has been many years ago so I can't remember.
The original is a masterpiece anyway.
If I remember, I have read somewhere that SNK did a third game for this franchise, and it was on mobile (can't remember but probably it was on Symbian, not even Android), but it was a more traditional shooter without the 2 screens gimmick. I'm not sure of this anyway, and I never had a chance to even see a screenshot of the game, so I know nothing.
Definitely another franchise I'd like to see revived and modernized a la Puyo Puyo.
I think that this game is underrated and unknown by many players because of the cute characters and the magical girl theme, a lot of people tend to have prejudices on stuff like that, sadly (the same reason why Nintendo removed the fairies from Panel de Pon probably); I think if it was about military airplanes, bombs and war, it would have been as well known as Metal Slug
, this is just wrong.
EDIT: anyway, Windjammers 2 gives me some hope...