My fave level was the unfinished backrooms-esque one. Something about it was just kinda cool about running around endlessly and seeing how incredibly screwed up the rooms started becoming. Somehow it didn't feel that threatening either, so that was also good for me.
I do hope that the end product is over an hour long. Since I got through my first playthrough of the second beta in about a half hour. But exploration of endless procedural generated versions of the levels would be fun after the main chapter. And I know Solo dev life isn't easy, I just really love the thought of having more places to explore.
Thoughts/Some things that'd be cool to add:
-Varied footstep sounds
-Random/arbitrary furniture having a small chance of appearing in places like the backrooms areas. Like singular chairs in the corner or something.
-Also support the idea of non-horror/no shadow people mode being available from the start, as opposed to it being unlocked or something.
-The music I heard I liked, but I only heard two songs and the rest was varying levels of threatening vacuum cleaners. I also miss having that surreal chill track in the pink pool area after the huge one you fall into from the first beta. I know it got moved into the Lazy River zone, but I thought i'd mention it.
Edit: Oh yea the jump is also really ridiculous, I can literally hit my head on the backrooms' ceiling without any help. Since big jumps seem important to the game, making it feel more weighty/not quite as accelerated might help.
And not sure if its an issue for anyone else but noticing the circuit box in the weird little hottub pool area wasn't super easy for me.
One other thing, I streamed this game for my friends on discord fine but it started making one motion sick by the end. It didn't bother me personally but I'll add that since someone else mentioned it making them motion sick somewhere in these comments too,