Hi Mcgeezer
First I want to thank you for development of another Amiga OCS game. Please do not consider my post as a critic of your work as i am only interested in expanding Amiga possibilities and see the progress i observe on C64 scene.
What i propose you here would probably ruin your code upside down, but i believe its worth it.
You will find below the HAM6 versions of original locations which you could replace those old crappy arcade versions.
There are very few HAM6 games and this is for a good reason, however this game seems to be perfect for the job as it uses 16px wide objects.
To avoid HAM fringe effects and time consuming drawings, instead
i would suggest to use hardware sprites to draw game area.
With good sprite multiplexer we would receive the game worthy of 2018.
I have found and made the best pictures of original game locations - Sphinx, Acropol, Neuschwenstein, Miami Beach and Los Angeles. I converted them using the best converter you can find and i have optimised it for commpression. The rest is yours my friend.