i took a look at it, and those are some pretty spread out intervals though i always see that kind of thing in piano books and wonder how or why people transcribe stuff like that
and my hand can only barely reach an octave
but the intro part, i play it sort of as transcribed in the songbook, minus the doubling of the bass, so the left hand is doing some alternating 16ths between each tone in the chord and the bass note so i'd do Gmin like G2-D3-Bb2-D3-D2-D3-Bb2-D3 (i don't remember octave number things) and loop that and then do the same for the next chord
but i like the midi, and it's nice to have an ascent of stan midi
edit this will probably better illustrate what i mean