That's awesome, man!
I love this game—I can beat it on the Atari and collect all the treasures; I know all the shortcuts. I'm going to give it a try!
Congratulations!
I’m doing something similar to what you did, but I’m using the Master System as a base, with the lesser-known game (Thunderground from the Atari 2600 as well), as a way to learn.
I’ll get there soon, lol.