The few specific rules are as follows:
Nations are denoted by their colour (clockwise from topleft: Purple, Yellow, Blue, Red, Grey, Teal or Cyan, Orange, Green).
Vin, Tai and Oca are canals.
Orange and Yellow start with two fleets and one army.
Hlo has an east coast and a west coast
20 (twenty) centers to solo on this board
game starts at AC2200, with a spring and autumn phase and a winter build. Years are donated as '00', '01', etc..
Standard diplomacy rules apply unless otherwise stated thus far.

(because the image is partially cut off, I offer an imgur link as well to few it completely: https://imgur.com/Z76MHPq)
Interested in joining the first (or second?) playtest? Or just interested in discussing theoratical diplomatic or board movements and tactics? Join the discord server here: https://discord.gg/UNEUmH35EV. For this first playtest, there are four spots open! Of course, you're free to ask questions both there and here, or offer feedback if you feel so inclined.
Edit: there are only two spots left!