Played this for a 4 free indie horrors and i didn't really enjoy my playthrough. There's no mouselock, the scares are pretty cheap and the flashlight is horrible. It's overall just not that well made and i think you can do a lot better. If you want a more full in-depth review. I give just that in my video below.
Viewing post in SCP-087-B Unity Edition comments
I do apologize how underwhelming v0.4.4 was on my version of 087-B Unity, but honestly, v0.5 is taking a extended period of time and I can't do a patch update like v0.4.5. Version 0.5 is set to solve all problems including mouse sensitivity, the locks you mentioned, the dropped chance of event floors (Which were too common, probably 40% common hallway), reanimated Masked Man, tons of new rooms, etc. Also, the Unity version you played in the video is actually not mine, I honestly have no clue where you got the other 087-B Unity remake.