The way ahead
Now that I have submitted my game and wait for more reviews, I really want to move forward with what I have. As the LD competition did not offer enough time to realize the vision I had in mind, it gave me the chance to explore interest, receive feedback and gather encouragement to actually finish something that I have started.
So... this'll be the direction I'll take for the Neon Hell backdrops from LD40 onwards:

BTW if you still haven't played my compo/jam entry, please do so at https://ldjam.com/events/ludum-dare/40/neon-hell / https://ldjam.com/events/ludum-dare/40/ld40-sirpump and leave a rating, thx!