If someone with an active SubscribeStar account could please pass the following on to the developer in a comment or DM, I'd appreciate it:
Version 2.8.0 Recorded Bugs (or noticeable problems):
1. The penis is not nearly firm enough during arousal in general, but especially in the later stages. I think this was done better in version 2.7. As the arousal bar fills, the penis should be quickly increasing in overall firmness. Once the arousal bar reaches ~70% the penis should be at maximum rigidity, and should remain at that level until the orgasm happens and finishes (though it should never be absolutely "solid": it always needs to retain a bit of flex / springiness, like hard rubber).
2. Tail flagging during an orgasm is still there, but is now VERY subdued (almost imperceptible). It was much more pronounced (realistic) in version 2.7, please greatly increase the strength / visibility of the tail flagging during orgasm in the next patch or version!
3. Thrust Speed slider seems to be completely broken, moving the slider to the far left and far right (as well as any position in between) doesn't change the horse's pelvic thrusting speed AT ALL while the penis is grabbed.
4. The "hitbox" for the penis seems to be smaller / more finnicky than previous versions. It's harder to grab and maintain a hold on the penis, especially during pelvic thrusting, ESPECIALLY on desktop when only using a mouse. For usability, please make the hitbox more forgiving ASAP!
5. The girl T-poses and doesn't enter her proper poses (not sure what causes it or how to fix / avoid). Edit: This might have been fixed in hotfix 2.8.2?
Feedback / Desired Features For Future Updates:
1. Solid black would be a very appreciated color option for primary / secondary coat color and the "markings" customization.
2. The maximum number of jets in an orgasm (when the slider is fully to the right) should be increased from the current 10 to at least 20, but much preferably 30 (ex: 24 jets over 15 seconds is very rare, but did happen IRL, and I can't replicate that in-game with the current limits). Each slider increment should add +1 full jet.
3. Is Mane and Tail color customization possible to implement? (White, Grey / Silver, Gold / Blonde, Brown, Black). Very Important: Black should be the "default" mane and tail color of most horses, not dark red like it is currently (that color doesn't occur in nature).
4. Mare should have the ability to orgasm too! (with her own sliders for customization - arousal speed, fluid amount - should be clear / transparent or slightly white-yellowish, orgasm duration, number of jets / contractions, a toggle for whether or not she squirts, etc.).
5. "Delay between jets" during an orgasm should be added as a slider / option (IRL 7 jets over a 21 second orgasm is realistic, but it cannot currently be replicated in-game because there needs to be a 3 second pause between each jet). For the slider, far left should be 0.0s (no delay, as it is currently) and far right (the maximum) should be at least 5, preferably 10 seconds. You should be able to set the slider anywhere along that bar, allowing for sub-second timing intervals.
6. The maximum (randomized) amount of time between the random belly-slapping instances seems too long. If I decide not to touch the stallion myself and just let the arousal happen "naturally", I sometimes end up waiting quite a LONG time. Maybe make this a configurable setting?