I have one question – Wonderbox: The Adventure Maker Review

I love this game, and it’s good to play when you’re bored. But when I was creating an adventure, I couldn’t figure out how to put a portal to a new box and make the adventure bigger. They have a limit on the height, length and width of a box, so I couldn’t just build the entire thing in one box. Can someone please help me?
Review by Sam 2459 on Wonderbox: The Adventure Maker.