Super Mario World is an early SNES game, therefore there are a lot of bugs which Nintendo haven't even noticed. If I had been the author of Super Mario World, I'd have fixed all the bugs, added SMB3 screen-scrolling pipes, ON/OFF blocks, donut lifts, stationary Hammer Bros., Boomerang Bros., a few more level themes (desert, abstract, airship), autosaving, ice flowers, use rarely/unused stuff, like maybe glitched Piranha Plant's stem or flying red coins, changed Luigi's physics and graphics (so Luigi won't look like recolored Mario and jumps higher), improved the level design and aesthetics, and changed the theme of one world and added one more world. Instead of Donut Plains, I'd have created a snow world and as an extra world I'd have created a desert world. I'd also have improved Pokey's speed and the screen scrolling where vertical scroll is needed.
What about your thoughts? What should've been changed in the original game, what should've been added and what would you have improved?
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