Catchthetrain

Developed by Ubique, catchthetrain is an EasterEgg hidden within the SBB smartphone application (also designed by Ubique, like other applications such as météosuisse). To play, all you have to do is enter the same departure and arrival locations in the timetable search function, then tap several times on the controller drawing in the error message that appears.

Source: https://www.persoenlich.com/digital/es-geht-um-den-spass-und-die-spannung (Translated)