I don't share the disappointment that some of the people here seem to have.
It's literally v.0.1, it doesn't get more rough around the edges than that. If you're gonna voice disappointment this early on into the development phase, you should probably wait until the full game is released because this kind of thing just happens in the first versions of the game.
If it's any consolation, the amount of work the dev(s) put into v.0.1 is higher than some other demo games I played with a far simpler programming interface like RPG Maker. Being disappointed at the current demo is like looking at an artist's first line on a canvas and calling the whole thing a letdown immediately.
Obviously you're free to have this opinion and I can't stop you from it, but there are far bigger concerns surrounding this demo than "all girls look the same what's up with that?".
For one, as someone who played the previous game from start to end, I need to bring up how atrocious a lot of the gunplay was and how many times I sat there wondering to myself if I'm holding an Assault Rifle or a Nerf Rifle - and that judging by this demo, a lot of the original code seemed to have been retained from the previous game. The guns still feel powerless if not for the fact alone that a lot of monsters simply don't seem to care that they're being shot at with an automatic rifle.
Other people have brought up that the girls feel like tanks and S.T.A.R.S Elite Soldiers and I agree with that. In the previous game, my best shot at getting a game over screen was bugging the AI to try and follow me into an area they can't get to, which will break them and cause them to completely ignore the enemies until they find a way to get to you - I did the same in this demo, though a lot simpler this time around. The girls can't interact with doors yet, so if you want to check out any of the scenes, I recommend that you let one girl leave through the starting area's first door and slam the door shut on the other two. That way you have an isolated teammate to watch and dissect the animations on because their guns aren't nearly as powerful when they're alone.
I hope future versions will include an accessible mouse sensitivity menu or graphics menu of some sort. My PC can only barely handle this game for some reason, probably because it's a roughened up Unity project still. I usually kiss my frames goodbye at Unity.