Super Freaks Stadium is pretty much done, I think. There's also a fun new feature I've added: Uncle Swordsman's Walkie Talkies, which serve as little tutorials. All you need to do is bonk them with your jump attack to learn some of Uncle Swordsman's wisdom.
With this, the first ten levels in the game can be played and beaten from start to finish. I still need to make some more climbing/rail grinding sprites for the characters, but I think I'm on the cusp of a new demo.
At this time, Mr. Freaks has 3,956 views for Super Mario Maker 2 spread across 67 videos. About 6 hours worth of Super Mario Maker 2 videos were uploaded to his channel, or 9.52% of the total watchable video on Mr. Freaks's YouTube channel.