NES Platformer Engine Current Status - Jan 2023

There's a million little things that go into building a game engine, that aren't always obvious. This is exponentially true when working on the NES! So with that in mind, I thought it would be fun to take stock of all the little things that have gone into my my current (an untitled action platformer inspired by Zelda 2 + Mega Man + Metroid).
The game is still a long way off, but I hope to have it done by the end of 2023!