We haven't tested this game with the itch.io app, so we are not sure how it would work with it. Are you on PC or Android? Maybe you could try a separate install independent of the app and see if it works?
I also just went through Public Build v1 and can confirm the h-scenes are there. Here is how to access the scenes:
- With Val, retrieve the cigarette from your room and give it to her via the Cigarette dialogue option
- Enter your room again and she should be there
- With Liz, visit Wesley in the post office and she'll now appear on the beach
- After talking to her, get a bottle of suntan lotion from her office, go back to her and click the Suntan Lotion dialogue option