I've made dozens of shmups already. It's actually pretty easy, and I don't know why you'd want to do a collaborative work. Unless you mean you want others to do the drawings for you... or like, make up bullet patterns.
Read up on
http://www.shmup-dev.com/forum/ if you're actually interested in making a Touhou-like game and aren't just trying to get
/prog/ to do something together.
>>4
insinuating getters and setters are bad
0/10