Starred Score in Super Mario World

When your save file reaches a score of 96 in Super Mario World, the score becomes *96, with a little star on it. What does this mean? Is it possible to get a higher score than 96? Or get multiple stars?

There are 96 exits in Super Mario World. The star signifies that you have done all of the levels.

More recent Mario games (like New Super Mario Bros. DS, and Super Mario Bros. Wii) have multiple stars available for completing different goals (beating the game. collecting all the coins, finding all the exits...), but Super Mario World only has one star.

Interesting fact:
In the Japanese Super Mario Bros. the number of completed levels is written in Japanese, unless you get to 96. At 96, it just displays the number "96" in our number system. (no star)