So could I expand upon the current level in my game and make it longer or would that count as changing the core game?

This is really interesting.  I discovered a few softlocks in my game I wanted to remove by putting more care into the state machine.  The uploads are disabled though, no?

In my case, I'd like to upload the same game in html so that more people can play it in the browser without having to download it. Can you confirm this is ok?

Edit: Well, it doesn't allow uploading until voting ends anyway.