Epic basically describes it. I dont know however what Doujin is care to enlighten me please? Anyways 10/10 5/5.
A Doujin Shmup (or shoot em up) is basically a Japanese made Vertical or Horizontal scrolling shooter like Raystorm, Raiden, or Gradius.
Please contact me if you would like to use this in a project. We can discuss the details.