The tremolo technique requires a fairly long period of rote learning.
Before playing beautiful pieces as Recuerdos de la Alhambra by Tarrega
or at least Feste Lariane by Mozzani when I was young I was very frustrated because
I did not want play the tremolo on simple chords or tedious study...
This is the reason why I composed Sea of Tranquility from the technical point of view.
I think the left hand is interesting enough but not too difficult.
If the left hand is too hard distracts you from the study of tremolo,
If it is too easy you get bored.
When I wrote Sea of Tranquility I was also very lucky because my feeling was sincere and
just fell from the sky the right chords