I tried running the game but the game said that my Itch.io key was invalid. What do I do?

You can give me your mail that you used to purchased so that i can check it out for you :D you can send it to our mail adress: info@gayeti.com

Hi I have the same problem. I just purchased and download the game, but I do not know where the key is? I try to copy paste Unikorn10128168, but the game say the key is invalid.