Thank you everyone for playing the game!
If you download the game now, there is hopefully a small fullscreen fix and something else as well.
Anyway, the ending, it's actually somewhat complicated, but hopefully I can explain:
The fact is, if you play the "best" way (the way I intended and consider best, at least), you will get the bad ending. Specifically if you decide not to kiss Cen (which in fact is the true choice, since she wants you to give her a kiss like being in love, but you cannot yet be in love with her that much for that kiss to feel like that), Cen dies.
And since not kissing Cen will get you the bad ending regardless of your choices before (even if you chose perfectly before), this in turn means that if you play "the best", or do the "true" things, you cannot save her and the bad ending is the true ending.
You can only save her by kissing her - so the good ending was "merely" my way of making it all right again, since that kiss, had you kissed her, would be inappropriate (you don't love her) - yet because she lives and you are together and in love, in retrospect, it is implied that you are forgiven for that moment of weakness by Cen. So, this is the explanation to that.
I don't know what "closure" of the story would mean, but
the bad ending
has, at least for me, all the finality that I'd want to tell. It doesn't matter what happened later, all that matters is what happened on the airship.
But yes, if I think about it, there are some things that are not explained in detail, and many topics come up, but they are not there to make you interested, merely to create the setting - and I guess the way to play the game is best if people don't look for questions or answers, just go with what feels right. Well, I don't know how to say that, but playing instinctively instead of logically, perhaps. What understand however is that it's not made obvious what to expect, so I suppose everyone comes in with different expectations.