I have canceled this project some time ago and started with a new game, because I do not like the engine I used for creating this game. I might take the concept and re-create the game in unity, but if then this will happen in the far future.
The dropbox where you could download the game was actually a private one I use for real things and sharing eith co-workers , but luckily nobody has noticed the game (me neither). I deleted it to make sure that this will not happen. I might upload the game on my MEGA again and make it accessible from there.