I'm so sorry! Have you tried redownloading it? Did it get interrupted during download? I'm not entirely sure why it would say that :/
Eventually, it worked ! thank god it did , because if it didn't I would have missed playing the best game ever .Honestly, playing the game was such a happy surreal experience , it was like a getaway from reality to a sweet world and everything was perfect : the dialogue , the characters, the stories ,the artwork. I hope that you'll make more marvellous games like this one .Yes , I'm a BIG fan now :D , thank you very much for this game!