I already managed to get it to write an implementation of Pong and a Chip8 interpreter, both in C and using SDL2 for graphics/input/sound (it even wrote a function to generate the waveform for a beep for Chip8 and rebound sound for Pong!). I'm pretty sure I can get it to generate all the code for a Gameboy or NES emulator, I've taken a few tentative steps and it definitely can reproduce the memory map and generate code to parse iNES/GB cartridge headers