[jdmoreira]

Isn't the PPU very hard? Especially the fact that both the 6502 and the PPU execute in parallel?

[plandis]

The PPU is definitely complex but the NES has the benefit of being much, much, much better documented than the GB which is honestly a huge advantage.

The NES also has a bunch of complex cartridge mappers but you don’t necessarily need to implement the most complex ones like MMC5.