Testing coding agent on an old ZX Spectrum machine code and Rust

When I was a child, I had a ZX Spectrum computer (Didaktik M). I didn’t play much on it — I was more interested in programming — but there was one game I loved and spent long hours solving its various absurd, funny levels. The game was called Jet Set Willy. For a long time, I couldn’t understand how so many levels, so much movement, graphics, wit, tricks, and secrets could be packed into 48 kilobytes of code. Decades have passed since then, and I’ve often thought about that game. I still don’t really play on the computer — it doesn’t interest me. I used to play Tetris occasionally, but no other game has really engaged me. I tried several times to rewrite the game for PC, using different methods, programming languages (C, C++), and documentation and source code. There are a few websites on the internet where enthusiastic fans have published the game’s machine code, and I used those, but I didn’t get very far. Yesterday, I decided to try one of the AI-based coding agents and attempt to r