Roblox apparently has done this for some desktop users via its icons. As you’ll see in the tweet below, the game has changed the icons for the player and studio programs.

ROBLOX is designed for 8 to 18 year old, ... NEW JAILBREAK GAME ICON! *CONTEST* (Roblox)Intro The Chainsmokers - Don't Say ft. Emily Warren (DEVI Remix)Outro R3HAB & Mike Williams ...

Just go to a game's details page and click on the star icon. This will Favorite it. For further specificity, some Roblox games and servers have their very own links.