So first impression: took 7 minutes to do the 5 rounds with every customer available looking at the same blowjob animation. I felt like leaving at round 3, but kept going to see what's this game has to offer.
Just when I thought I'd be rewarded to do every customer of the 5 rounds, I accumulated a total of 940 gold, which you need a minimum of 1000 gold for any new unlock... That's not super motivating as I need to go back again for more money.
There should be new unlocks at the first 5 minutes of gameplay, otherwise you'll lose your users. Perhaps reducing the rounds to 3 and increasing the gold so you can at least unlock something. If you really want 5 rounds, maybe that will work when you have more girls, so that could be increase over time in the shop.
I love the theme and the art style, just need to tweak the gameplay so it can be more fun and engaging.