Super Mario World - Sega Genesis/Megadrive Game
Created by pirates...
What would happen if Chip & Dale for the NES, and Super Mario Bros' had a love child? This piece of garbage.
This is the first few levels (The only Mario themed ones) played on an emulator. Yes the game runs as bad as it looks.
UPDATE: Turns out this is a hack of a better game known as "Squirrel King", which I've also uploaded a video for. So there you go.