i'm absolutely inconsolable right now and it is ENTIRELY your fault
all jokes aside though, this is genuinely a masterpiece! i completed all 15 endings on normal in 6 hours (as well as got every achievement bar the hardmode one, entire-game ones, talk option one, and kill option ones), and it was an absolute blast the entire time. i'm gonna finish up the last achievements someday, but reading 200k+ words is a lot so i think i'll maybe update this one last time with that when it happens :P
my one regret is that i got ending 12 first - it naturally feels like it's supposed to be an out of the way one, but i'm a naturally stubborn and determined person so it ended up being the first one i got. i'm absolutely certain that if i'd walked through all of them sequentially, i'd have probably genuinely cried at the end (and i'm chronically emotionally constipated- that's a real feat.)
another game i love (metaware high school (demo)) has one true ending whose impact is fulfilled much more by the generally-fluffy sub-endings alongside it, and while i know that having ending 12 be inaccessible unless all others were completed would be a HUGE drag... hey, i wouldn't be complaining if there was another one added :P!
every ending seems genuinely fulfilling, though, and that's incredibly impressive. not only are they all somewhat hopeful, the message of the game speaks to the never-ending spirit of life (human or otherwise): no matter which ending you get, the plot feels like it's resolved properly. that's really hard to do, from what i can tell, and it's really refreshing when sometimes there's VNs or interactive fiction games whose endings tend towards being "whatever immediately makes sense" - they can be great fun with fluffy stuff, but tend to lose out a bit on the nuance. this game DOESN'T do that, and it's extremely coherent as a result, i think!
plus, you've done an excellent job with every emotional beat - it's only due to meta knowledge that i was able to avoid a likely Bad End in the Gaslight Gatekeep Girlboss section, and it was still a crapshoot if i'll be honest. and the description of reactions to traumatic events, emotional digestion, and coping mechanisms is extremely on point with how i'd react personally - i might actually take inspiration or reference for my own writing because it's sorta sparked some ideas in my head.
also trigaea is just incredibly technically impressive - i'm starting out with twine (or i was a few months ago) and i genuinely couldn't imagine how to format most of the things you've done - let alone implement them in a way which is even remotely optimized or reasonable for a janky 2012 laptop to run.
genuinely one of the best games i've played, on top with hacknet and MWHS(D). kudos to your technical skill with coding, game design, and emotional storytelling; your mechanical skill with art, graphic design, and writing, and your empowering model of the world's core issues. you have at least one machine believing in you now!