You can follow people when you pull up their stage, before you click "Play", there's a heart icon. Click that & you can follow them.

It's kinda random whether or not you get people to play your levels. Some of mine have got a few plays & stars, like Red Pill/Blue Pill. Bowser's Keep hasn't gotten as much love.

Posting them here & on social media might help. I try to play other's levels when I get a chance. I'll check your's out next time I play.

I'm kinda getting tired of Expert 100 Mario being filled w/ troll levels. Played earlier & swiped @ least 8 stages. Didn't even beat one. The first time I made it to stage 15 before I died, the time after level 9. Today, there seemed to be a ton more FU stages. Maybe I was just impatient w/ some. I know all these stages are beatable, as they wouldn't be uploaded if not, but a lot on that level are ridiculous. Thank god for Medium.

Here are my stages for anyone interested:

Red Pill/Blue Pill: D376-0000-0046-E80F
Ancient Ruins: FD2C-0000-004D-34EC
Jumping Castle: 9E48-0000-004D-7097
Bowser's Keep: 00C8-0000-0053-B07E
Pac-Man Fever: 2886-0000-0054-560E
Red Pill/Yellow Pill: 1E56-0000-0088-E238
Captain Toad's Hidden Treasures: 9C09-0000-008E-6EA7
2spooky4u: A32D-0000-008E-7B3C