Ha right, thanks!! There's another song where you fight the normal Cirno, but she get berserk after that. And you can see at the end that she froze herself with her own attack (LOL)
If you never played before, I suggest starting with something easier, because this is a very hard song. The plaquemix songs you can get on stepmania . com is a good place to start.
Okay. The theme and the song I'm playing on this video is not compatible with stepmania 5. (The version I'm playing is 3.95). You should look for themes that are compatible with 5