I thought of a good way to make the controls better while allowing you to still use the jerking feature, I played a little of Milking Mira! and think you could do a similar milking/exhaustion system they have going. The controls for jerking could be for example "Q" makes you jerk the cock upwards and "E" makes you jerk it down or q just jerks it and e makes you finger her, But I think the addition of allowing her to regain stamina slowly by waiting and not fully exhausting her would be beneficial that way the gameplay loop isn't jerk, buy potion, feed potion, jerk. The potions could bring the stamina up and boost her sperm count temporarily and make them more useful than just for stamina. Anyways I'm ranting but i would like to see more things added to the shop like cosmetics and an auto milker would be cool to have multiple futas kind of leaning towards a tycoon playstyle. Please let me know what you think, I know you are probably busy person so dont feel obligated.