Tux and Fanny is a point-and-click adventure game in which players explore the house of the titular characters and surrounding environment and discover and interact with items.

[3] Tux and Fanny also features a library of picture books designed by the developers and other artists, additionally containing the novel Moby Dick which can be read in its entirety by the player.

[5] The pair collaborated following an open invitation from Birney on Twitter to find a developer to adapt his 2019 film Tux and Fanny into a "point-and-click adventure computer game".

[5] Tux and Fanny received a positive reception from publications, with reviewers praising its tone and ingenuous depiction of the minutiae of daily life.

"[4] John Walker of Buried Treasure praised the writing as "amazing throughout, combining the naive joy of the two main characters, with the metaphysical angst of the game’s wildlife.

Nicole Carpenter of Polygon noted the game's "appealing sense of ease" oriented around "the joy and surprise of discovery", stating "instead of stressing out or getting stuck on an idea, I simply move along and keep searching the world".

Sarah Maria Griffin of The Guardian wrote that the "many tiny comics and zines that are a joy to browse through", and praised the game's minigames as "purposeful and even occasionally poetic in their execution".