For 0.996b(not the most recent one, but the last few seem to mostly be bugfixes for things I never experienced so I haven't updated yet. There doesn't seem to be much gameplay changes from the version I'm using so this should still be relevant)
It's a pretty fun and simple game. The animations are a bit clunky at times, but it's still fine. They are a bit limited though. You really only get 2 positions to choose from(missionary or doggystyle) and I feel like it's too copy+paste from character to character this way. Should really consider adding some new positions or something so at least jumping from one girl to the next can feel a bit different
The random encounters are a nice touch. It's nice having characters approach you once in a while so it feels like they're more real. What's even better is you can toggle this feature on or off for each girl
The girls themselves are all pretty unique in how you have to approach them. Rogue is basically the freebie easy mode character. Kitty is a closet nympho who you have to give cutesy compliments to ease her up. Emma is a bit of a challenge to work with, but that's fitting with her character. Laura is more shy so you gotta work slow. Storm is fairly easy. Jean is the only one I really struggle with. It's a bit too difficult to raise her affection. That bar is always almost empty for me. Should make it easier to get her affection.
I think new girls should be added in. There aren't really too many X-Men girls to pull from, but it's ok to branch out. Like, Mystique would be a good addition. Wanda would be a great choice. Jubilee would be fine too I guess. Even some other Marvel characters like She-Hulk could be nice touches. Just needs some more girls to help keep things varied.
I really enjoy choosing what the girls wear and when. Few games really give that level of control. It's really nice and I hope more outfit options are added for each of them in future updates.
I feel like the Campus should be expanded. As it is right now, you just have your room, the girls' rooms(which are all the same functionally), the gym, shower, class, and Xavier's office. The "issue" here is that some of these don't really seem to serve much purpose. I just got Xavier's key, but I have no real reason to go into that office. There's a pool, but it takes a lot of grinding to buy a swimsuit for each girl so I haven't even really did much with it yet and I can't imagine it's too different than anywhere else. The gym(danger room) is just meh and not too special. Showers are nice, but it seems a bit too "open". Like, it's just a door and then you're in the women's shower where teachers and students shower together. I'm not saying to get rid of it, but maybe add some private showers in their rooms?
There should be more areas to explore. I feel like a goal you should add in is having a more luxurious dorm to stay in. Maybe have a rent system where you have to pay a small amount each week to stay in it or you could have a single upfront purchase of the dorm. It could have multiple rooms and you could give keys to the girls you want freely walking around and sleeping there. If new positions are to be added, you could add some furniture animations so you can do them in different rooms with different animations for the respective furniture in those rooms.
There should be more "public" areas in the school too. Like, add a park(not the campus square. This could be used for privacy), a janitor's closet, more classrooms, etc. Just some new areas you could explore, interact with, and bring the girls.
The outside world should be explored through more than text boxes. Maybe give a city map where you can go to various places for dates, hangouts, or general wandering(for random encounters with other characters). Not all of it has to be sex oriented either. Some interactions with other hero characters or even villains would be a nice flavor touch. If you add more Marvel characters, meeting them out in public would be a good way to introduce a connection with them.
Missions should also be something you could explore. Have X-Men missions that take student volunteers for on-the-job experience once in a while for some extra money. If you feel like making those more than just some text boxes, you could use this to introduce some female villains to call from time to time. If you really want to avoid clashing "plot" of villains and heroes being too close to each other, you could have the "Brotherhood of Mutants" try to recruit you by inviting you to their hideout in the city and have it act like an villain's version of the school campus where villain girls are found. Villain girls could open the window to nice random encounters where they sneak into the main school to find you once in a while.
The game really is nice and fun. I just feel it can use a bit more depth. It doesn't NEED more depth, but it could really help it a lot in my opinion. It could also really use some music and sound effects as pure silence is not that great. You easily forget about the silence, but it'd still be nice to have something playing once in a while with some options to turn it off if you really didn't like it.
I hope you take these suggestions to heart as I think they would really help improve the game. Can't wait to see more updates in the future