Really good.
It was really hard though. I rated it good because I like a challange anyways. The concept and gameplay is interesting. I managed to pass the first level with some ease, but in the second level, I made the mistake of not sending newt into the small area, and I had to give up ripley because there were about 10 waves of aliens coming from above, and I still lost.
Good:
-nice gameplay
-good concept
-good graphics
Bad:
-add an easier mode
-survival would be nice
-make it so that we can select team-mates to go in any order (during a turn, not at beginning)
I think you have something going here.