Pretty neat little tech demo, though it's not much more than that sadly.
Some of the changes made to the art style are very jarring as someone who's played Portal 1 and 2 to death. Some changes range from questionable to outright bizarre, as well as some important props just being completely unchanged such as the companion cube which feels incredibly jarring. The game's performance is also less than stellar, barely breaking 10fps with an RTX 3060.
This game is worth trying if you want to waste an hour, but beyond that I don't see it having much lasting appeal besides being a fun little oddity to test how strong your PC is.