Good potential. I'm a sucker for Slavemaker style games, and this ticks a lot of my boxes. The art is good, and the writing decent.
The UI I have mixed feelings about. On the one hand it's very pretty, very slick, very professional looking. On the other, I don't find it particularly easy to use. All those dark blues are certainly easy on the eye, but I'd sacrfice some of that in favor making it easier to read the skill labels and/or to see at a glance where the progress bars were without squinting.
A couple of things that I didn't enjoy so much: Exhaustion seems to trigger before the energy bar is empty, and it wipes you out for a couple of days. I know this was a feature of the original Slavemaker games but even when I'm watching for it and taking care to rest myself and my slave, it still seems to sneak up on me. See previous comments about the readability of the UI, I suppose.
And a purely personal thing, but I'm not a fan of the MCs more submissive moments. I like my character to be in charge. I don't mind the initial coercion scene, since I can look forward getting my own back at some later stage, but getting raped by a tentacle monsters (albeit in "fleshlight" mode), not really my sort of thing. Which isn't to say it's a bad thing, just not my kink.
Anyway, not bad. A bit more content, and maybe an option to turn off some sorts of content and it could be very good.