[Madmallard]

Does it actually play identically or is there going to be weird bugs all over the place?

Seems like an impossible ask to verify if you don't have an immense test suite that covers everything.

[oynqr]

The parent of the parent project has ground truth replays, which get compared to new PRs. The game uses lockstep networking, so this is required to prevent desyncs.

[Madmallard]

That sounds nowhere near adequate