Putting my comment here since I can't figure out how to review the Steam demo.
The graphics are nicer, the best parts of the first game's gameplay are preserved, even if the movement physics feel a *little* different, and I prefer the revolver and machine gun here to their closest counterparts in 1.
That said, I'd be lying if I didn't prefer the first game's art direction. Generally for being more cartoonish and Nintendo-console FPS feeling, but especially with the shotgun.
Literally every other weapon is either an improvement or at least equal looks-wise, but the shotgun just does not feel as cool as it did in the first game visually.
I also kinda prefer the character designs/proportions of the 1st games huminoids, but the new ones still look good overall.
In other words, this is shaping up to be an overall amazing sequel to an already amazing first game... even if I desperately hope you make the shotgun look more like it did in the first game, because the new look just isn't it imo.