They could pull a Fortnite The Block and make it so that you can publish your own maps and they have a chance to show up and replace the basement map every week or five days. They'd have to get someone to monitor every map though and make sure it's not inappropriate. Or they could do the normal sandbox mode where you can play you and your friends maps. Also, why on earth are they making such a crazy gamemode into a LIMITED TIME feature???? Like do they not want us to enjoy their game?