Thanks so much! The Dam is definitely an homage to the Keep (it should totally be a landmark).
In Put to Paper, you can place any cards from your hand atop the stack, which means the Blueprints stack can start to get non-blueprint deck cards in it. Reading that over, I should probably change the name of the starting cards for clarity!
As of the RoomJam version, the composition of the deck is 6/3/3/3 for birds/fox/mouse/rabbit cards, which means bird cards should get drawn about 40% of the time, increasing over the game as cards are crafted and added. I plan on shifting this breakdown closer to an even split, both to make piloting better as well as to balance their progression.