It's surprisingly deep and somewhat addictive. There is some artwork in the game files that hint they may have plans for expansion of the game into future eras. I hope that proves to be the case; the game has potential to be so much more than it already is.
While it's deep, it's not extraordinarily so. With Civ games, people like
@MadDjinn or
@TheMeInTeam could write a legit thesis on winning strategies for the game. Polytopia isn't anywhere near that complex but at the same time it's not exactly simple either and has non-obvious winning strategies that reward players that put effort into fully manipulating the systems the game offers.
Because there are less actions a player can take, the AI is simpler than the Civ ones but at the same time, it performs much better. In fact up until that last game I wrote up, the AI was consistently outfighting me in ranged duels due to superior unit placements on the computer's side. Even now I basically drew even in the shooting war with Bardur and it wasn't until I had the resources to send a wave of melee's across the ocean did I win. Oh and all the while I was getting pounded by the Atlantians ranged attacks - I was unable to mount
any counteroffensives in the west thanks to Atlantian ranged harassment until the last five turns of the game.
But there I go again. I'm telling you it's pretty dope.