Hi Woblo
I've had a look at your license in the zip, however it is invalid. The Python wrapper for Raylib (previously known as Pyray, now known as Raylib-Python-CFFI), is not zlib like the Raylib C library is. Pyray is actually licensed Eclipse Public License v2.
Because of this, to satisfy Pyray's license, you merely need to include the source code to the CFFI wrapper itself (github.com/electronstudio/raylib-python-cffi). You don't need to open source your game, just need a copy of that library in the zip here on itch.io.
A simple fix. Not destructive to your game's ownership either. Cheers