First of all, super cool. I have a soft spot for SimTower as well. :)

> I didn’t want to do a function-by-function port. First, APIs may be copyrightable - and copying a binary that closely might implicate copyright more than an approach closer to clean-room design. But it was clear that I needed some level of feedback from the ground-truth binary in order to provide a hill for the LLM to climb on the reimplementation.

Interesting, but isn't this what, say, the Ocarina of Time reverse engineer port does[1]? I imagine the fact that this hasn't been served a takedown notice from Nintendo is a proof that it's defensible? Or at least that there's precedent, ha.

Anyway, this is really cool. I genuinely think the only thing that's missing for me to waste an afternoon here is the sound effects!

[1]: https://github.com/zeldaret/oot