We had a short discussion about that game over here:
They answer that (partially) in the “Risks & Challenges” section of the Kickstarter page:
“Thanks to a funding by the Medienboard Berlin-Brandenburg and our own crossfinancing through other projects, we were able to already finish a huge part of the game.”
The developer is a German TV studio that produces several popular German TV shows. So they have/had some money.
/edit: You will find more information about the “Medienboard Berlin-Brandenburg” on Wikipedia.
