NapperC Sorry for the late reply! The exact example skeleton is not in the Spine projects we distribute, however, I think celestial-circus and cloud-pot, which use physics constraints, may be of help to you. Physics constraints provides properties such as Wind and Gravity, and by changing these values, you can create animations using physics. This makes it easy to create floating objects.
There is a video that explains how to use Physics constraints, so please refer to this video as well:
https://esotericsoftware.com/spine-physics-constraints#Video
