Something I can immediately say as a tip - if possible, get an editor.
The writing itself isn't bad so far, I've only seen the very early bit, but the story does seem to have a potential to be gripping. The problem is, you have a lot of small issues with style, grammar and punctuation, which brings down the overall experience, at least for me.
Things like missing spaces after periods and question marks, weird stylistic choices - e.g. "[...] I saved her. If someone buys it, I get money [...]" or "It's my opinion, I didn't refuse you a favor" - consider "Hey, I didn't say I wouldn't do it" or "I just stated how I see this, I didn't say I would refuse" as alternatives. People don't really talk like that, neither in literature, nor in real life. Also, grammar, e.g. "Listen, I here to free you". Sure, they're small issues, and none of them are really game-breaking, but they accumulate. And right now I feel like there are too many of them to just hand wave them away, at least for someone who actually cares about the quality of the writing in porn games.
I know that while you are writing, it is difficult to keep track of things like that, especially if English is not your first language, which is why having someone take a look at it from the outside can be really useful. Now, if the world building was some complete bullshit with landladies, deadbeat fathers and childhood friends who immediately throw themselves on your dick, I probably wouldn't say this, but I feel like you are trying to create something a little better than that - and writing quality can separate a mediocre game from a good or even a great one. So getting someone to QC and make the dialogue feel more natural could really help, I believe.