CelestialAmber/TetrisNESDisasm — reverse-engineered prompt

I want to work on a clean disassembly project for the original NES Tetris ROM. Set up the repo so it can build the matching Tetris NES ROM from the assembly source, using the install notes and the existing Makefile.

Please make sure the build process is easy to run from a fresh checkout, with any needed setup documented clearly. If anything is missing or depends on external tools, explain it in simple terms and add a short troubleshooting note. The goal is not to remake Tetris or add new gameplay, just make this disassembly project build reliably and be understandable for someone who wants to study or modify the NES assembly later.

Also check that the generated ROM can be verified against the expected hash from the README, and add or improve any simple command that makes that verification straightforward.