Taisei is a fan-made Open Source clone of the T?h? series.The Touhou Project, also known as Toho Project or Project Shrine Maiden, is a series of Japanese bullet hell shooter video games developed by the single-person Team Shanghai Alice. Team Shanghai Alice's sole member, ZUN, independently produces the games' graphics, music, and programming.Based off of that, Taisei is a shoot ?em up game with lots of bullets. The game is almost complete and very playable.