Alright, it's what I expected it to be. A gallery viewer with no real gameplay to it, but it's got the aesthetic of being in a big elaborate environment to break that illusion a bit. There is also one seemingly empty room with a big scene in it in the demo, so I'm thinking there might be more of those scattered around like secret scenes.
In other words, always do a bit of looking around in future empty rooms.
Let's see. Given that this is a unity game I want to see if Reipatcher will work to translate that font. ...The answer is no, damn. Maybe there's a way to change it to English in the game's options.
What else of note. The hero of this tale is handed over to another succubus and taken through her private quarters filled with more succubus before being taken to a big scene, before being handed back over to the succubus you get carried around by at the start. They shown off some more of those in instances too, so I'm thinking we'll see more of those in the final game.
Also you can only exit scenes right after the hero climaxes and the succubi absorb his "essence".
With that said, here's hoping we get some more varieties of slime girls. I know there's at least one of those that plays a part in this game but I'd love more.