Geometry Dash is $1.99 and has a garbage icon, and it’s 5th on the Paid list. Been up there for as long as I can remember. Ballz is free but also has a bad icon and only screenshots of game play, yet it’s the top listed Free game.
You need some kind of marketing to get the word out there, but if it’s not super fun and nobody wants to tell their friends about it, it’s not going to be super successful.