I just started playing this yesterday a bit, takes a bit of getting used to it seems, I found the controls and what not a big strange at first, and had a hard time just finding the enemy that kept shooting at me and flying off, I failed hard needless to say, by the time I figured out how to maneuver half way properly and target, the match was over.

anyways, for people interested, you can grab it here.
http://www.touhouian.com/2011/03/touhou-sky-arena-download.html

It would be cool if their was a translation patch, if only for the interface.