Hey flavor, its indeed an oldie, the port is based on the gp2x version i made 15 years ago, but i do still use the graphics and sounds you sended me all those years ago (both in 1 bit playdate version and colored graphics version), i just adapted it a bit to match playdate controls. I do remember your code being a big help to understand how the engine itself worked.
Last year i've gotten a playdate and i've been steadily porting all the gp2x games i did so many years ago :)