did you write this is 6502 assembly from scratch? if not what tool/framework did you use?
Viewing post in FROM BELOW - A Real NES Game! comments
Its a mix of C and assembly (but mostly C), written from "scratch". I wrote about it in detail here if you are interested:
http://www.matthughson.com/2020/12/07/from-completely-in-the-dark-to-complete-in...