Hey guys,
I've bought the game some days ago and played it quite a lot with my daughter. As off now, it stopped working.
I've tried starting the game several times, I've tried several hacks that were recommended for games not working (starting as admin, starting straight from the hard drive, disabeling steam overlay, deleting and re-installing, deleting the Download Cache in Steam) and nothing changed. All I get to see is the red fox and the blue fox chasing each other in the middle of the screen for 5 minutes - which is when I stopped the process via task-manager.

Thanks for your help already