I think so! And guess what? One of the characters in Double Dealing Character (which is TH14, the last one) can
reverse your controls. ZUN hates us orz
The main games, yes! But there are some spin-offs :
Four fighting games : Immaterial and Missing Power (TH07.5), Scarlet Weather Rhapsody (Th10.5), Hisoutensoku (TH12.3, which is more an extension of Scarlet Weather Rhapsody...), and Hopeless Masquerade (TH13.5).
Two games where you can shoot the bullets with a camera (these games are reaaaally hard since you can delete the bullets) : Shoot the Bullet (TH09.5) and Double Spoiler (TH12.5).
And one game that doesn't fit anywhere, Great Fairy Wars (TH12.8) where you control Cirno who can freeze the bullets.
There are also six previous Touhou (TH01 to TH06) that were published on a former console that doesn't exist anymore, the PC-98.
A biig series in the end, and I didn't even mentionned the related CDs, books and such %D