What can I expand upon in my game?

Hello! So currently I have a Skydiving game called “Skydive Paradise X!” and I would like to make the game more interactive and make players stay longer. Currently, all you do in the game is skydive and do an obby.

I was thinking of adding pets or more content to it. And adding a skydive system like in the video below.

(skip to 6:26)

You can play the game here:

Note: You need at least 2 or more players.