>>1
A touhou clone (or any other shmup) would probably be better written alone or by 2 people, trying to organize
/prog/ to do something like this is probably pointless. There have been enough shmup engines made already, and plenty of touhou clones made by
individuals. Coding such a game is likely not very hard. If you want it, just get to it!
The harder parts are getting some art for it and designing the danmaku. Initially you could resort to just ripping ZUN's.