I like the idle sim concept but the gameplay is pretty simple. If you just go for the attraction upgrades before the coin upgrades, you never run out of people. It seems to also go on forever, but the gameplay never evolves. Maybe have a minigame during the animation where a higher score = higher payout / tips from the customer? Could even just be clicking on certain points of the character during the event.
Also consider adding new NPCs, animations, or some sense of progression the further along the game goes to keep things from going stale. SFX would also really help the presentation and horniness factor a lot.
Looking forward to the future updates, keep up the good work!