Tenebra is a homebrew puzzle game by Haplo for multiple computer systems and game consoles such as the NES, ZX Spectrum, and Atari Jaguar. It follows a player character who finds himself stuck in multiple very dark rooms filled with rails, doors, and crumbling architecture, As he is incredibly afraid of the dark, he refuses to step outside of any areas of light, requiring the player to get creative with the sources of light available in each room if the player character is gonna escape.

Cephla here plays the NES version and helps the protagonist endure their fears and escape every dark room they find themselves in as fast as possible.

You can get the NES version here.