Oh wow I'm amazed to see you're still active! I've not explored much in terms of adult games tbh, almost everything I've seen is either a pre-rendered animation or an interactive story. I assume people are in it for the visuals rather than the mechanical aspect of it. Plus I imagine it's hard to convey realistic erotic scenes without slipping into uncanny valley (which a lot of them do with pre-renders anyway).
I tried playing all of your Haikus, some of them I either don't get the mechanics of or just am not good at. My favorite by far is Traumfaenger because I have the most control in positioning the subject and ropes to see how she reacts. It also allows for more body movement, which you managed to program so believably - Her bending over in ecstasy, moving her hands down to her crotch (when she's allowed to), the ability to flip her on her back/stomach, it's all so simple yet effective.
If you're looking for feedback, here's my two main takeaways:
I wish there were a sliding scale of stimulation, as well as negative feedback the player can react to and adjust. As far as I understand the current scale is static - with enough stimulus in the right spot/rhythm subjects always reach "enlightenment"? :D One thing that would make it feel more natural would be for Her to start off softer, with a gentler sensitivity and gradually build tolerance to rougher stimuli as She gets used to it. It would require the player to watch/listen to her body to provide the most pleasure at any given point and watch out that they don't overdo it. That would probably also require an "overstimulation" mechanic, something like a "negative/pain glow" when the stimulus is too much. I have no idea how difficult that would be to implement though. I feel like anyone who's attracted to this game concept is probably interested in BDSM dynamics in real life, and IRL it's essential to understand consent and communication (throughout, not just at the start) and adjust based on the subject's feedback so everyone has a good time, not just the one who's in control. With the above mechanic the player would be able to develop that interpersonal skill (practiced in your simulations) to real-life scenarios. I fear the lesson they learn (as is) might be that the ideal Dom will incapacitate their subject and keep going at it until She inevitably glows. I feel this change would turn Her from an object into an NPC , and go a long way in de-objectifying women. That's also my main criticism of a lot of adult games, and granted a lot of them are fine with objectifying women. But good BDSM never does that in a dehumanizing way. Yours is already leaps ahead in that regard, at least requiring the player to consider how to provide pleasure to someone, not just pick the cutscene closest to their fantasy.
The second one is a nitpick, but what you did for Him in Canon I felt was lacking for all other subjects. That is, there's not clear enough player feedback once She's reached climax (or maybe I just need to git gud with them haha). I think She twitches when at Her highest glow, and then ragdols for a couple moments before defaulting back to the original state, indicated by a desaturated body hue? In Canon you had both an audio cue as well as the canon itself exploding once He's climaxed. That's probably overkill to implement to each haiku, but compared to that I can hardly tell when She's been satisfied fully.
Can't wait to see what you have in store!