I wrote an elaborate guide for this game: https://pastebin.com/a30vqfwG
It contains information on the conditions for the various endings and detailed instructions for example playthroughs that reach them, along with a lot of information about the inner workings of the game. I hope people find this useful.
Note that there are currently two minor bugs in the game that slightly affect its logic. The guide explains them. If an update is ever released to fix them, I'll have to post an updated version.
Edit: Looking at the uploaded guide, it seems Pastebin is a really bad fit for the style of formatting I picked. It didn't look like this in Notepad++. Sorry about that. Didn't expect it. I suggest downloading it and viewing it in a proper text editor.