Damn, great job, clearly too sci-fi / synth-heavy for the cartoonish world of Mario, but the sound design is awesome, the mood is great for underground, and the pace of the piece great for a 2d platformer. Composition wise it's well balanced and the chord progression + the little chiptunes arpeggios here and there prevent boredom.
Also I recommend you post a link to your submission on the discord, to prevent score penalty happening from having not enough ratings.