Your post says the grey meteoroid must stay readable while moving, so the concept above is built for it: a grey test rock clears 3:1 contrast on 98% of the centre and lower play area. Five separable layers, 12 tones max each, with ring and planet shadows.
We make Animated Pixel Planets and Pixel Space Backgrounds (24 parallax scenes, 5 layers each): https://reeboolabs.itch.io/ and https://reeboolabs.com/
Final $100 within 5 days, 2 revisions, palette hex included, PayPal after approval.
Is this direction worth refining for World 1?
Alrabia
REEBOO Labs