Yeah, there's two solutions, in on of them you have to push both box together, and in the other one you push one at a time.
80 days ago (+1)
i actually ended up creating this situation👇. (recreated it in photoshop just for reference) !Spoiler for a possible solution below!
After that it was pretty smooth sailing to the end. It was really satisfying trying to find a solution here. Thanks for the design and balancing!