I have been having a blast with this so far. This game involved an extensive amount of note-taking and hit a perfect level of challenge.
I also had the black screen bug on a certain system but you addressed that in another comment.
I have finished 3 endings (both choices in the Spire and 1 in Escalation). I was surprised that the player receives the same prompt despite what their choice is in the Spire. It sort of took away the significance of making a choice. I would have liked to hear more detail about the results of each particular choice.
Any endings I missed?