Keyper should soon receive an expansion, Keyper at Sea, that will offer the possibility to play the game solo. The solo mode is designed by Dávid Turczi.
(image from BGG)
Keyper is a tile placement and a worker placement game, that features lots of "keyples" and foldable board. In the expansion, you will deal with fishes, and may encounter sea creatures and treasures.
(image from BGG by user Christo)