Yes it's definitely ambitious for a tiny budget game that is also my first project. I have to keep catching myself from falling for feature creep too. Because implementation is often slow (I can only afford to pay a programmer part time here and there) I just often end up coming up with some cool new idea in the meantime while waiting for something to be done. I wish had the resources to have a proper team this game would be done much quicker.
In regards to mirrors. The main reason I wanted them was for upskirt situations. Because I have more emotive poses, that naturally gives more viewing angles for each character anyways, so mirrors for more facial angles is slightly redundant. If I had more resources I'd put them in anyways but I have too much feature creep. I don't even have enough money to have half the characters I have planned to be drawn up, even without mirrors.
Once a build of acceptable quality and with a good variety of characters is up on Patreon, if I get enough interest and support and people want mirror's I'd have no problem adding them in as an update. But in the meantime it will have to be something on the waiting list or just implemented for a few special characters (and these characters probably wont be in the first version either, I am trying to fit each character type into a realistic setting that they would appear, and the mirror girls don't fit for the first level who's characters I am prioritizing the first few commissions). I do really think that the huge increase in emotive posing will more than make up for it though. Plus there are a few other little things not in ImpG I have planned that I don't want to spoil, I want to see people's reactions when they first play it.
And how many characters? Too many lol. Probably wont be that many in any initial release, but provided I get decent Patreon support I will be adding characters for quite some time. Variety is of utmost importance for a game like this so I am really putting character count as a top priority. And yeah there will be male characters of course, traps as well (there's gonna be some surprises when undressing haha), but the female character count is the highest. There are also going to be stuff like Catgirls and Alien chicks (think Twileks/Asari) to have fun with as well.