This app is a Touhou ProjectLostWord maniac quiz.

"Touhou Project" is a copyrighted work produced by the Japanese doujin circle Shanghai Alice Genrakudan. It consists of games, books, music CDs, etc. centered on barrage shooting. In a narrow sense, it is a series of doujin works produced by Shanghai Alice Genrakudan.

The works of "Touhou Project" are sometimes collectively called "Touhou". It is sometimes called the Touhou series, but ZUN, the original author, states that Touhou Project is not a series.