Here is a list of changes other than improved graphics and sound. Any member can add.
-The first toad house in world 6 has a hammer suit. It originally had a mushroom, flower, or leaf.
-The battleship level has a longer log on the last ship.
-Some ice block structures were altered so you can't do a certain glitch.
-White block in world 5-7 is turned blue.
-The last pipe in plant level #2 is longer and has a block on it.
-You can move earlier when in a toad house.
Again, anyone can add!