I'm not being cryptic with anything. Could I be a bit more clear? Probably, so before I give you the answer let me clear a few things up.
- I said it all relates to Act 4 part 2, and they're endings to the current content. I didn't say it was the full game ending, I said it was the endings at the moment.
- I'm going to suggest exploring and trying things since it takes more effort to type the instructions or to ask the question. I said to the left and from your description you went right.
- The endings come after the big flying boss. If you can't go somewhere after killing the boss you either have a bug or didn't explore all options.
- In the event you might have a bug:
An end of content screen isn't an ending. they're not 'endings at the moment' either. They're not endings at all. MoeyMoey may have some endings planned but they aren't in the game yet.
I've explored the entirety of act 4 part 2. I've opened everything that can be opened. I've gone left and right after defeating the boss.
If you get the red eyes none of the doors are available anymore, if you just defeat the boss you get the same end of content screens you get if you don't defeat the boss.
Finding the plant girl and guy after defeating the boss gives the same scene as finding them before you defeat the boss. Walking down the train tracks after defeating the boss gives you the exact same end of content screen as walking down the train tracks before defeating the boss.
The end of content screen IS the ending and there are currently 3 ways to get that screen:
Let boss finish you, then run down tracks (True ending)
Run down tracks ASAP (Virgin Ending)
Green people (??? Ending)
Those ending names were taken directly from a dev post, there is only three endings idk where this talk of a 4th one came from
An end of content screen isn't an ending. There may be endings planned in the future but so far they aren't in the game yet.