I really enjoy the gameplay in this especially when comparing it to the dev's previous works. At one point I was just playing the game without regard to the H content. It's kinda like one of those bargain bin PS2 games you would buy and be pleasantly surprised with.
There are some things I wish the devs would expand on. I like the "cross range" hold attacks that drain the enemy while returning your health and vice versa. Most of the animations aren't too involved but some are. I'm not sure how to suggest they be expanded but I feel like they need something.
For one they can only be used on each enemy once, and each enemy can use them on you once. They need to have a reset on this, or even an option to use the attacks as many times as you want. (This could prolly be hacked in honestly)
Also I'm a ryona fan and wouldn't mind having a minigame, or QTE, or something along those lines to escape from a hold or be drained indefinitely instead of a set animation that plays once. For some of the more involved animations this could take the form of a series of tiered QTEs that progress you further into the animation or escape. Suppose I'm just wishing at this point. Some of this stuff could already be in the game, I haven't updated in a couple versions.
tldr: Love the game, wish they would expand on/tweak the ryona "cross" range attack gameplay.