My name is Vince and I make arrangements of (mostly) video game soundtracks using Mario Paint Composer (1992). I do this by solely listening to the tracks at a lower speed and try to decipher how to recreate it on Mario Paint. This can be fairly challenging, as Mario Paint has limited options.
I prefer to recreate fast tracks with similar sounding instruments to Mario Paints soundset. Examples of games that contain these tracks are Pokemon, Kirby, Super Meat Boy and especially Undertale.