It seems in this building in the upper floor (level=1) there is a minigolf called "Kulnari mistery golf". Not accessible in wheelchair.

via StreetComplete 53.3

Attached photo(s):
https://westnordost.de/p/169735.jpg
https://westnordost.de/p/169736.jpg
https://westnordost.de/p/169737.jpg