Fantasy Explorer Nitroid

Fantasy Explorer Nitroid! (幻想探索 にとろいど！, Gensou Tansaku Nitroid!) is a puzzle and exploration based platformer by the doujin circle Desunoya, the makers of other Touhou fangames such as Marisa and Alice and Guruguru Suika. The game stars Nitori Kawashiro as she explores Gensokyo in pursuit of an escaped "nuclear reactor."