Sorry I didn't start the game sooner. It's been in my bookmarks for a long time, but other games somewhat similar to yours are too often abandoned, or the updates are disappointing, both in terms of the lack of content and the waiting time, and even more often, they add bugs instead of fixing them. So, I waited a bit...
Are saves from the previous version usable with the latest update? I think yes, but one said, better be safe than sorry, so...
I see. Don't know much about this engine, but if there's one thing that's irremediably a deal breaker for me, regardless of the engine used, it's the "Real Porn" tag. So, this one's definitely not for me.
That's fine, we can't rewind time. I could have checked the comment before, it was just bad timing for this specific update, so it's not a big deal.
Saves are compatible. It might be a different deal if you skip several updates in a row, but usually save compatibility is preserved (I do warn about it in the changelog, in the rare cases where that's a possibility).
It should be finished this year. Main story has been finished for a while now, and I am trying to tie all loose ends, include some side content for the late chapters, add some QoL changes and so on.
The game doesn't have a replay gallery, just a CG gallery. If you want the full gallery unlock, you can use the debug tool "Travel sphere" (in the key items) and interact with the NPC in the bottom-left corner.
I update every month and the game has been in development since the dawn of mankind, pretty much.
