You got the bad ending if the mc truly died. You made a wrong choice at one point in the game. The vision part at the archive to give you a hint without spoiling anything.
Well we don't really know what the good ending is because there is at least one more update coming on the 24th of January. You can get the bad ending in Build 12 though based on your choice in the archives where the game just ends at one point and you simply die. If you went for the other choice in that section the game won't end there, the story will continue and end with the "To be continued..." at one point.
...Wait, but haven't choices have been completely irrelevant for progression until now...? Unless it's just hidden... The game seemed pretty much linear with choices purely for interaction purposes.
If choices are relevant it should really be up to the creator to insert instant feedback... I haven't bothered to put saves before major choices, I just saved randomly.