Great game! I managed to win with a goldmine strategy, supported by a lot of card-draw (pretty much had a few of every card that drew cards in my deck, but with a higher ratio of 0-cost cards like isopod, helmet, ingot, and minecart) and energy generation (furnace, smeltery, salamander, cave koi). Only had one walkie-talkies to support several goldmines, but it worked very well. Final deck size of 76.
EDIT: Beat the game again today with the same strategy - multiple goldmines + one walkie-talkies and a hell of a lot of energy generation and card draw. It’s a pretty easy combo to get going and supports larger deck sizes (this win was 69 cards in total).