One of the few RPGM maker games that justify it being a game, and not an interactive slideshow. Roya is a harsh world and you'll actually have to use your brain to explore and survive. The Atlus inspirations are blatantly clear from the combat to the time-management to the dual real and fantasy world narratives, complete with a pseudo-awakening in the eleventh hour of exploring the first major boss's palace --er, realm. Thought was evidently put into the decision making moment to moment gameplay. That being said, it's often quite difficult to ascertain whether you're ready for an area without prior knowledge, which can lead to some annoying save scums as you enter, and then get immediately blasted by the boss way harder than you (the deep forest is a good example of this). Signposting where exactly is safe for you through dialogue or allowing running away from more fights would be good ideas I think. The game, like the early iterations of SMT it draws inspiration from, is unforgiving if you dawdle, and the pressure to play optimally, especially for all the pink scenes, is a bit too much, I think.
The game is hard as balls without prior knowledge, even if you're familiar with the genre, and most of this comes not from the boss battles, but from knowing what you can do, where you can go safely, and where you can not. Coupled with the fact that a lot of things in this game are timed or limited, I feel that there's a lot of potential for new players to make decisions that could make the playthrough much much harder for them without even realizing it (not investing in the Slime for example will likely make or break playthroughs, but its importance is really never mentioned). The NG+ feature somewhat alleviates this, but again, the game is so long that it feels like a gorilla patch rather than a real fix.
The story is serviceable, it's engaging enough to the point where you do wonder about the mysteries and what will happen in the end, but not anymore than that.
The sex scenarios are good too, if not static; even in this stage of development there's quite a few of them. This game is indeed a heavy slow burn. I imagine the sex scenes from here on out in the late game will only get sluttier and sluttier (who plays corruption games to make the MC pure?), so make of that what you will.
Anyway, if you like corruption games that are fun to play, you should definitely play this game. Just pick Easy on your first playthrough if you want to optimize. If you don't like waiting ten to fifteen hours to see penetrative scenes, don't like hard games, or only play complete games, you should probably skip this one.