Here are just a few things among many improved things that came with the new version of the script:

Game submissions
Users can submit games to your arcade ready for you to approve via the admin panel. Credit is given to the user on the game page and the game shows in their profile in a 'submitted games' section. Can be disabled.

Friends system
Users can now add friends by sending a request to another user. When the request is accepted, they are added to your friends list. You can then view friends-only leaderboards and challenge friends to beat your score.