Black pawns notice the walkers and build fortifications with turrets to the north of the factory

You walk up to the table.

Use a UNO flip card to flip the entire board upside down, revealing a new game.

If another comment decides to flip the board back up, we continue from Day 50.

Wormsign spotted in D1.

One more unit appears from the top row of the ice age, the White (Walker) Queen.

Zuck gets pulled into the upside-down but can still communicate through Christmas lights.

the board gets knocked off the table.

the ice age doesn't notice and stays behind (but continues to advance)

(Inspired by AapoL) The emissions from the factories cause global warming, the weather drastically changes every move, every extreme. (Heatwave, hurricane, winter, etc.) Next might be extreme summer with everything catching on fire.

The factories start to melt ice because of the heat.