The movements feel very stiff and its awkward moving diagonally, the fixed camera angle can also be painful in enclosed spaces because it's too close.
The voices are a great plus, and the overall ambiance, sound-wise and graphic-wise is very good.
I managed to get out of bounds by going through the door I spawned in and just fell forever, but thankfully theres a respawn button.
I did the zone with the 3 portals 4 times before going to a new zone, not sure what changed it as I tried all 3 portals, if you had to beat it multiple times it would have been good to have some clue like flames appearing, because I almost gave up there
The ambiance was very good and polished, but sadly it was spoiled by stiff gameplay.
Great job !