Heyo,
New to the community here, looking forward to writing games for the arcade soon! So I've two ideas at the moment:
Perhaps when the arcade has picked up even more popularity there could be the possibility of having new sticker skin designs? Not a priority but just an idea.
Second is the possibility of adding a high-score table to the games that come preloaded with the arcade. Or some kind of application that could be downloaded where the player's high scores could be saved to the arcade.
That is all for now folks, thanks!