"Desert Palace - Sonic the Hedgehog 3 & Knuckles" is a high quality rip by SiIvaGunner.
Jokes
The song is not modified until 0:29, when the melody changes into the song "This game" from Konomi Suzuki, that is used as the opening theme of the anime No Game No Life. The joke is that in the already mentioned time, the original song follows a note pattern that is very similar to the anime opening.