Game of Hearts has a lot going for it. Great renders, music, interesting characters that may or may not become more nuanced as the plot progresses.
The first chapter is like 50% sex. So, if you are seeking an arousing time, it certainly fulfills that wish. However, the power dynamics are very one-dimensional at this point. The MC is fully in control due to his powers and the existence of much more powerful beings that could harm his standing and relationships is only hinted at. Some characters (like the purple haired woman) are only shown but their role is not explained yet.
The plot is basically still in its infancy and the main reason is the huge amount of sex scenes compared to actual plot scenes. There is some talk about imminent danger and the need to acquire power (by having lots of sex) and minigames surrounding the sex, that seems to reward healthy buildup to intimacy instead of going to town and abusing the demonic power. But it's still just sex, it's not really driving the plot forward, it explains nothing and the women are all potential damsels in distress, lacking charisma and influence.
I really hope that they become more daring and determined as they gain access to some of the MC's powers and as the actual plot evolves. Right now, the game plays more like a trainer-type of game. The fact that all women agree to sex with the MC cannot quite hide the fact, that they all do this from a position of weakness and desperation, or because they are manipulated by the MC's demonic charm. It's a grey area between genuine affection and abuse of power.
I see lots of potential in Game of Hearts, but also some traps that could lead to lazy storytelling. It would be easy to make the MC a Chad, that is always in full control, to disregard all his followers to sexual zombies with no wishes and ambitions of their own, or to focus too much on sex at the expense of solid storytelling.
But it's way too early to tell. Right now, there is only potential and beautiful wrapping. I will adjust my review as the plot progresses. (I only reviewed Chapter 1 so far)