I've always had a fondness for Cotton, an early "cute'em up" for me. It hit right when I was starting to learn of Anime/manga, so the Japanese-y look and feel fell right in place. I will say it does has it flaws, it seems a little unpolished on the game play area. Along with the graphics seeming to be pushed a bit too far. I do find it a challenge, with it's fire/charge mechanic on both buttons along with the Twinbee bell style of power ups...it's hard for me to attack while doing crystal management...but I fault me on that, not the game so much.
Never beat it, so I look forward to getting some games in and improving. Glad the GotM is around, it give me an extra push to play my games.