Overview
This is a reverse engineered clone of Super Mario World.
It reimplements all parts of the original game and a bunch of mods added by Lunar Magic. The game is playable from start to end.
You need a copy of the ROM to extract game resources (levels, images). Then once that's done, the ROM is no longer needed.
It uses the PPU and DSP implementation from LakeSnes, but with lots of speed optimizations.