Outstanding game, one of my favorites so far in the Jam. Everything is really polished, unlocking new content always feels like it opens many new strategies, and it's just addictive to play. I finished in Era 4 but I was just one turn away from winning in Era 3. Congrats to the whole team!
Also thanks for providing downloadable versions because the web kinda lags for me (I don't think it's on you, it happens for most games)
Oh and, I thought the arrow button on the top right was an undo button... I accidentally reset my game during my first attempt :D