: The game features three distinct stages , each escalating in layout complexity and enemy density.

Interspecies caves, where different species coexist and interact, offer fascinating insights into evolutionary biology, ecology, and conservation. These caves can serve as natural laboratories for scientists to study how life adapts to extreme conditions, such as the absence of light, unique chemical compositions of water, and isolated ecosystems.

is a 2D adult-oriented action-platformer developed by UminoKyuri . Released on Steam in late 2023, the game features Reisen Udongein Inaba, a popular character from the Touhou Project series, in a derivative fan work. Gameplay Overview

: The game uses detailed 2D pixel art and focuses heavily on high-quality animations for its mature content. Release Context

: While originally released on independent Japanese doujin circles (like DLsite) in 2021, a version is also available on Steam via NupuryuSoft . Udonge in Interspecies Cave on Steam