s/fine/crappy. Alas, all I can say is maybe. Because this emulator doesn't have some of the components that, say, an Arduino UNO might have, it doesn't support the entire AVR instruction set. For example, there is no UART support. I did write a bit that listens on a port where I could send the emulator keystrokes to mock up a UART (mostly just because I was stuck on something else and needed a distraction), but I didn't need IO, so there really is none, currently.
Uploading machine code -might- break something. But in a fun way, I think.