I know this may sound stupid and probably won't work but...
Missions. When I opened a map(I think it was an old version), it would say that the mission (e.g. slopes) opened. So what about actual missions in the map? I know minigames are fun and all, but how about an actual mission. I thought the tutorial worked out well so how about making that bigger and also it could be that a certain save bricks (e.g. ACM city) would have maybe enemies like bots or events like getting past lasers.