Please go to Files then Builds to download the main executable. To run from source, you must have pywin32 installed on Python 2.7.
This tool allows one to create Unturned servers by just running an executable. It allows you to specify port, number of players, server name, game mode(Difficulty), server timeout, whether its PvP or PvE, and the welcome message. Future updates plan an actual User Interface and a list of items to add to the server.
If you are not familiar with port forwarding...