A Cardcaptor Sakura game where you play as Kero?
Years and years ago, I found a Cardcaptor Sakura game where you play as Kero and fly around and eat food. If you missed a lot of food, then you'd start falling and then you'd get a game over. It was a popup game from some fansite I think, I don't quite
I think I know the game your talking about. Unfortunately the site that was allowing you to play that game got shut down.