Hi! Thank you for asking. The build instructions are in the README file, available, e.g., at https://github.com/LambdaHack/LambdaHack/blob/master/README.md. Feel free to use the chat options mentioned in the file to get some more guidance. Also, please be invited to open a ticket on LambdaHack github project (in the future perhaps a fork or a standalone project) documenting what game you are designing and what engine extensions would be needed to make it possible. Have fun!