Super Mario World (TechEruo GBC Tech Demo)

General

 * Using Yoshi transforms you directly into Yoshi due to technical limitations, similar to Diddy Kong in Donkey Kong Land series/GBC Donkey Kong Country.
 * The music is compressed into 8-bit versions.
 * The in-level hub was replaced with a horizontal one due to the screen size.
 * The power-up storing box doesn't have a sprite of the item, instead opting for symbols, for example, "M" for Mushroom, "F" for Fire Flower and "C" for Cape Feather.
 * The in-world hub now lists the worlds under 2-letter categories next to the level name.
 * "YI" for Yoshi's Island
 * "DP" for Donut Plains
 * "VD" for Vanilla Dome
 * "TB" for Twin Bridges
 * "FI" for Forest of Illusion
 * "CI" for Chocolate Island
 * "VB" for Valley of Bowser
 * "SW" for Star World
 * "SZ" for Special Zone
 * Spin Jumping is now done with holding A and B at the same time, and the same applies to jumping off Yoshi.

Sprites

 * Mario now has his sprite from Super Mario Bros. 3

Levels

 * Yoshi's House no longer has apples
 * Yoshi's Island 1 replaces the Pipe Cannon with a regular pipe
 * Yellow Switch Palace now only has 256 coins
 * Yoshi's Island 3 now has autoscrolling
 * The water in Yoshi's Island 4 is now opaque
 * Donut Plains 2 is flattened due to limitations with the autoscrolling