With the two days since I downloaded it, I can say that it is really and that I love it. Although, I would like to suggest a few things.
Could you implement a day/night cycle and a clock that depends on the device's time zone, depending on the schedule it could be morning, afternoon, or night. You could also indicate at what time other characters might be "available" to us. Additionally, at night, more specifically at midnight, we can have sex with Rex in other places like the park or an alley, also meet more night characters and possibly have access to gay bars, Cruising, sex clubs, or swinger clubs.
When we have sex with Rex, it would be great if he also gave blowjobs or handjobs. Also, had more pose and depending on the dildo, Rex would show different reactions depending on its thickness, length, and shape. And, if you can,
with the mouse or finger we can control our movements or the dildos, as in BedPlay (I don't know if you know it), if you can, you could leave it as an optional feature for people who prefer automatic.
I clarify that I don't know much about programming, I don't know if my suggestions are too complicated ( ´ • ·̫ • ` )