Well, once you get to the later girls, the game DOES get easier.
Now then, you could have a gallery mode for the various game overs and endings, in later updates.
This game is nice, but it has one major flaw: It feels like it's trying to tell two stories that don't quite fit.
On one hand, it tries to tell a story about fighting an alien invasion.
On the other hand, it tries to tell a "girl gets caught and fucked by aliens" story.
But sadly, the game can't reconcile both stories organically, leading in the largest issue with the game: the ACTUAL main character.
He feels like he doesn't belong at all in the whole "h-game" thing, since he never gets laid and his involvement with h-content doesn't extend further than "walks in on lewd things". As a result, he feels like a mix between the "shy harem protag who stutters around and stumbles into lewd situations he can never fully partake in and will likely die a virgin" and the "Light Novel protagonist who is inexplicably better than everyone around him, especially the ladies".
The other games do a better job at mixing the h-stuff with the rest of the plot and make sure to have a protagonist who partakes in both, at the very least.
I only know how to get the last Nyx scene. I am not deep enough in Sasha's story, yet.
You must go to that bus stop a little below the ruined town at night.
But you must do it while coming from the north.
There, you will see a ghost girl. You must sneak up behind her and engage in a conversation.
You'll even get a new tag from the encounter.
Goes well and all, but I have a few things to bring up on both the technical side and the story side:
Technical side: There is a bug where, when I have sex with the villager in the first quest, the scene is inexplicably me as a futa even though I picked a guy.
Story side: How am I expected to beat a vicious demon with the power of a dark god? A backwater kingdom and a few neighboring tribes wouldn't be able to do what an army of orc failed to do. That bitch could crush ANY human army by HERSELF! It'd take the forces of the ORIGINAL Slave Lord AND the Sisterhood just to even things out.
Well, now that I've beaten the first boss, I can say that at least the beds address the whole "finite stamina and health" issue in a way. However, I've run into another issue that Nyx doesn't have to worry about too much while Sasha has so much trouble that it becomes a chore: Sasha doesn't have any reliable ways to fight ghosts other than charms, which are not easy to come by.
The haunted dungeon should at least give something that could address this issue, even something as simple as silver bullets for her handgun.
Because these Krasue monstrosities are a series pain in the ass.