This was not covered in the tutorial but are there suppose to be invulnerable enemies? Many runs were cut bc enemies were immune to all damage I dished out. One bat I pushed him back into a corner for 5 mins and could not kill it.
Or bosses that don't take damage and their health is always at full
I saw on steam they have a beta branch of the game that has bug fixes, I fear that the GOG version may not get that or patches.

I've never had a problem with such things, as well as your 'bugs' thread. I've successfully played through up to the violence boss without the problems you mention.

Thanks for your input but not sure how it helps the situation.
It is akin me saying my takada airbag deployed by itself on my honda and you replying that you have driven your toyota 2 years with the takada airbag and have not had it self deploy... Everyone's computer config are different unless you are on a mac.

Well anyway I've been working with team17 showing them logs and game streams to replicate the issues on the GOG stable release .13.14
There was a new release this morning; 13.19 which fixed many of these issues and I've been testing it all day today and have not been able to replicate the issues. I fired up my old 13.14 version and was immediately able to replicate the invulnerable enemy bug by floor2.

If anyone else have similar issues please use the gog launcher to verify the game if the new version does not automatically download.

Your first sentence was a question (further suggested by the question mark), which seemed to ask if this was a normal occurrence, so I answered in kind.
I'll remember not to assist you in any capacity, further.

Again thank you for your input I am not trying to be unappreciative and I am responding respectfully.
It was a rhetorical question, if I wanted to pick on parts of what you said I would have said something like there is no nightmare mode as you mentioned or nightmare boss and question if we are talking about a different Neon game like Neon Chrome. I assumed in good faith that you are referring to abyssal mode.

With that being said, the unity crashing issue is still there, coupled with the lack of updates on the GOG version I am somewhat disappointed. As another user mentioned the game pub did the same thing with worms where they released it and didnt support the platform after release. Although fun, I cannot recommend it unless it goes on sale or until they show more love to the GOG version of the game.