Disney has a lot of lost media. From Mickey Mouse to Missing Series, it's definitely what we mostly searched for. Here are descriptions of online games I vaguely remember.
First one:
There was this game I played when I was very young. It was on Disney when they thought, "lol" and "XD" were efficient terms. It was associated with TRON, the movie. You could design anything using tron characters and stickers. As I said, I briefly remember it.
There isn't necessarily a second one, but there are a lot of others of the same type. There wasn't only TRON, TRON is all I remembered.