Several notes: I like the basic premise here, but the writing is... really bad. Almost boner-killingly so. In addition to just the bad grammar and text colors, it's just not that well written. It's sorta like Corruption, where I get what the writer is going for, but spending a couple bucks to have someone whose a native English speaker re-write the lines would go a long way.
To fix the font issues: I'd suggest you do things in dialogue boxes with the speaking characters portrait in them. Look at The Company for an example here. Obviously, this is only the prototype state, but I also feel like the corruption of hte world should happen a bit more gradually, and should happen through your influence, rather than just "okay, made a deal with a lust goddess and now everything is orgies." I mean could she have made this deal with anyone? Why did she wait?
I know, even I can tell I have a long way to go on the writing, dont know about hire someone else to re-write then howerver, I will try to improve on my skill the next update will hopefully fix the bad grammar , and I will re-write the worse passages of the game.
About the text color, its a place holder for a potrait system exactly like the one in The Company(One of my favorite games together with A spell for all), I just started working on 0.2 and i'm already running out of colors to use. But I need to learn more of CSS to do this, also want to use the pics of locations on the background instead of the top of the passage.
I also intend to make Nina's motiations more interesting, right now i'm tinking of tying it to the death of the MC's parents, but could change my mind.
About handing the player more control over the corruption I might do It but probably much latter in development, right now I will try to improve on the foundations I have and add more locations an characters.
Thanks for your feedback, its important to hear some criticism to know where I should Improve.