Nice thread! I started reworking Robocop earlier this year too, mainly to increase my 68k abilities (which are still severely lacking, after on and off for the past two years) and as some sort of hobby to get away from Swift and iOS.
Bit of background; I had been using the assets from Super Star Wars but couldn't find a complete and decent tile set to work with after successfully implementing sprites and basic blitter work so Robocop was the next best thing I could think of at the time.
This is AGA, single playfield and in 64 colours. Parallax is done with 64 pixel wide sprites. There's some issues with the cloud speed which I should really fix too.
As you'll see from the video, I gave up when it came to restoring the background using the blitter.
[ Show youtube player ]
I'll get back into it at some point I'm sure, but at the time I was happy I'd managed to get the tile map working and scrolling correctly.
Good luck with your port, it's already looking great!