The game was built using raylib, you can use this code by accepting the terms of the license.
All kinds of contribution is accepted, just make sure to test it before sending a pull request.
Download the repository with
$ git clone https://github.com/TheDarkBug/simple_TTT_online.git
$ cd simple_TTT_online
Download and build raylib:
$ cd lib
$ ./setup_raylib.sh
$ cd ..
Run the setup_android.sh
script
After that, you can compile:
$ make PLATFORM=android
$ make
$ make PLATFORM=linux_win
Currently none of my computers has windows installed. Some time in the future I'll write a guide, I promise.
I do not own a mac, so I don't know how you should build the program, anyway i think that the procedure is similar to the linux one. Good luck!