A little update to the page to commemorate making a crapton of progress on it. Check out all the new screenshots!
Thank you for your continued patience.

I'm humbled that you liked it so much you lost track of time. Thank you, but also I'm very sorry lol
And also, sorry about Rosa and Stella! There just was no room for them in the plot. I mend that partially in Matters of Trust, where Rosa plays a far more prominent role. I hope you'll enjoy what I have planned for her.

As for your questions:
Answer 1: I answered a similar question from Gilogg a few weeks prior. To add onto that response, had I played Ending 4, I would probably not have felt the need to make LSS at all. I'd have been satisfied with the happy ending and moved on. It was a storm of perfect coincidences.
Answer 2: I wanted to come up with my own conclusions for the characters without seeing the canon best ending, motivated by seeing E3, then E2, then E1 in that order.
I'm of the opinion that people can still envision the characters any way they want. LSS and MOT try to stick to the canon as much as possible (while taking some creative liberties) but otherwise the choice is on the player if they like that interpretation or not. Same as how I wasn't content with the side cast of SG and gave it my own spin. Players can iterate on that, reject it, whatever they like! Cavemanon liked it well enough to consider it on par with SG, that's the baseline here.
How did "sanctioning" come to be? The lead of Cavemanon just asked me one day and I said I'd be honored. That's about it. You may notice in the patch notes that he's being credited for a lot of narrative feedback. As for his reasoning, I never thought to ask.
Yes, I'm responsible for 90% of the art in this game. The remaining 10% is, Seal (made by a friend), Trish sprites done by Mellow (which I expanded upon), a few Fang outfits and Moe/Stella edits from Moe Job and Trust Your Colors. This was a one man job for the most part and everyone's welcome to use them in their projects.
In my case, when I was playing the game blind completely detached from the wider community, I just saw E1 as a good chance to try my luck with Ren'py.
Being able to take a story I like and just add onto it with such ease, tap directly into the game, it was like a dream come true. Everything else came as a result of that freedom. I can't thank Cavemanon enough, I had a lot of fun working on this.

Thanks for playing!
I really like how Fang and Anon are written in E4 and regret not going for a similar kind of synthesis of Fang/Lucy in LSS. It really is the best outcome for a character like her, the scenes these two share are the main highlight for me. E3 is still my personal favorite, I think it has some of the best, most impactful scenes, but E4 is definitely up there as well.
As for how the rest of the cast was handled, yeah, I like my own interpretation way more. Felt there was a wasted opportunity delegating their conclusions to comedy bits. I'm happy that LSS lets fans of these characters get more out of them.
The way I've seen demos done in this modding scene, they're oftentimes treated as a v-slice that promises a full experience later. In my case this wouldn't really work. This WOULD be the full game, and showing only a portion of it would defeat the purpose of crafting a larger narrative.
To that end, I'd rather people get to experience MOT in full on their first try. I'm happy to hear the buzz around it and hope it'll be worth the wait!

First documented Steam Deck player of LSS lol
Looking into it, the sprites were mistakenly left in the gallery from a pre-Pristine Cut version and are impossible to access.
First three are Fang's post-time skip outfits which were replaced by the layeredimages system. They used to be "fang 15b" and "fang pjs", now they're both "fang_15b" and "fang_pjs".
The last one is of Naomi from the old version of "Facing Naomi", it's basically her post-time skip outfit but without the long hair.
Apologies, this is a huge oversight on my end! I will patch these up for the upcoming actual final update.
New bonus story coming out at the end of this week/next week!

Continuing on from "A familiar face", Trish and Wren go out together and have some takeout, but each have a hard time letting go of the past. Canonically the final bonus story in the LSS timeline, the unresolved plot thread of Trish will finally come to its conclusion.
Yeah, I decided to do it anyway, in spite of what I said in the past. Planned release is either end of this week (14.09) or the next. Will be packaged with a multitude of fixes, new artwork and more small narrative adjustments.
New patch is out! You can read the full changelog here! I hope you find the changes worthwhile a second playthrough!
Change of plans! All I needed to do was be smart about file optimization. Compressed the songs down a notch and now the game's even lower in file size than before.
As for dividing the game, it'd add a needless extra step to installation, I'd try to refrain from touching that as much as possible. Luckily it's not necessary anymore.
If you still remember what those errors were, I'd appreciate it if you reported them to me via either @snoot_talk on Discord or via my e-mail snoottalk@proton.me. The game is planned to have one large update in the future, including remakes of existing scenes, so any help would be greatly appreciated!
Patch 1.03:
- accidentally added in 1.02, finished writing additional dialogue for a few scenes
I just realized I released patch 1.02 with a new unfinished (WIP anim and pacing, otherwise fully playable) scene in one of the final chapters. I wrapped it up real quick and it's ready now.
For full transparency, it's at the very end of the Naser route of the epilogue, starting with "Anon, one last thing". I was ironing out a plot point that got a little sidelined in the heat of things. Alongside this change, a few other pieces of dialogue got updated (Ripley route, the ending) to reflect this. Apologies for the inconvenience!
In the future, any significant narrative additions/changes will be kept for a larger patch/improved cut of the fangame.
Patch 1.02:
- numerous small improvements to text pacing
- polished up "A path in the woods" (quick menu hides any time the StP cast speaks, removed the remaining {nw} tags since they notoriously break voice line playback)
- added a few new things to one of the secret bonus stories
- remade Naomi drawings at the dinner table, the OG artwork can still be procced and found in the gallery