What is TouHou project?
Another weeb thing?
（↑A well known Fanmade one.）
東方Project（とうほうプロジェクト）, in English: Touhou Project
Touhou Project is one of the top 3 big IP in Japan created by ZUN. Its originality includes shooting games (STG), fighting games (FTG), music albums, comics, fiction, Behind-the-scenes set (BTS), all happened in a separate world Gensokyo.
Just a shooting tunnel game with some fan made