There's a few differences here and there, but by the author's own admission,
they brought over model and sound assets from the original game to ensure as close to the original vision as possible. Unfortunately, that also makes it even more likely that the game could be taken down.
They also wanted to recreate the opening and ending cutscenes, but found that the time required to do so would have taken too long for them. This is as far as they got before deciding to release the game without the Reedus reveal.
Still, possibly the most faithful recreation so far!
Happened to me as well, had to restart to get the picture frame to appear on the ground to properly get loop 2 to function.
