Thank you very much.^^ We actually got the inspiration from an episode of the German series called "Tatort" but they probably got inspired by Groundhog day, so... whatever xD. About the difficulty: I think it's actually a bit too hard, at least as a first level, but because we were just able to finish day 1, we did not want people to win by accident.
Anyways, thank you very much for the nice feedback and we are happy you like it. :D