Made it to level 35. Some enemies are extremely difficult.. impossible to shoot their bullets. Still, I am getting farther the more I play. :-)
Alright! It was tough as I had a hunter alien on my heels the whole time, but I was able to reach Nicole, who was attached to the Marker. I defeated her (eventually) and made my escape with Ellie. What a cool game. Final boss and game ending! Great stream!