I'd say a little bit less than an hour. It's not the worst "immersive art" installation, but also not the best.
The name is "Planet Happiness" at Mont des Arts
Wort lustig. Lustig maimai.
https://networkscience.wordpress.com/2019/01/18/game-dependency-graph-the-secret-of-monkey-island/
I don't know what they are
I'd say a little bit less than an hour. It's not the worst "immersive art" installation, but also not the best.