Since Mecha Moon was in the 2016 version, it gets a secret level, which is unlocked after beating all of the previous secret levels. Ultimate's Mecha Moon is a pretty big departure from the original version of the level, so Moon Secret sticks very closely to it instead. The main gimmick here are Gravity Zones (which tbh I need to make look better). The green up arrow ones are low gravity areas, while the red down arrow ones are high gravity areas.
At this time, SuperFreaksDev has 3,956 views for Super Mario Maker 2 spread across 67 videos. The game makes up 6 hours of published video on his channel, roughly 9.52% of Super Mario Maker 2 content that SuperFreaksDev has uploaded to YouTube.
1