The Touhou series is a bunch of doujin shmups. The official English Wiki can be found here. Wikipedia has its own separate article here with an immediate example of how difficult the games can get.
Really? Is it possible that this battle is a 2-D recreation of some 3-D Mario battle (like with Youmu Konpaku), or did you think of all those battles as well?
I am surprised that there could actually be something solidly original in this game, as the boss patterns, the music, the powerups and...
I'm a fan of the Touhou franchise and recently came across (and fell in love with) the fan-made Super Marisa World, an obvious Mario parody from the items to the enemies to the bosses. The group of us in the English-speaking Touhou community that enjoy this game have been keeping track of which...