sudomod

Hello,
I have a problem programing the teensey board that controls the buttons of the gameboy. I have downloaded arduino Ide and teensey software, but when I try to load the software provided in part 2 of the game boy zero guide (https://www.sudomod.com/game-boy-zero-guide-part-2/) an error pops up that says:

'Key' does not name a type so I can't load the arduino project to my teensey. Any help?

Thanks in advance.

I don't see an error in the code. Can you setup your IDE to use english for error messages and post a new screenshot?

Nevermind, I just tried again to load it to the teensey and worked fine. Maybe it was some library that wasn't updated.
Thank you anyways.