U just upgrade corners pick upgrade for rook in same colum, then burn every piece that isn't rook then u try upgrading sides and u are just stacking this and dont waste too much money at the start to get interest.
I played it, but my score started going off-screen, so I couldn't even see how much I scored in rounds 35–45. One thing that isn't great is that during the first hour of the game, I couldn't understand the mechanic where picking more pieces at same time gives you more points.