This looks pretty good it reminds me too for Maddness.
I have only 2 crits for you , or maby a suggestions
You should make collision on the bullets to hit the 'platforms' because that looks like cheating on the video , shooting the AI from below
And the second one , make the head turning when you point up or down.

Again , pretty good. Keep up the work and , personaly , I cant wait to play the demo