Not sure if I am missing something but I have gotten the gaz and put it in the 'location' I did the floaty ball and hit the button that appears but it does not initialize the system. The power room and the plane say System not initialized.

Is this as far as you can get solo?

After opening the entire map (which I am very proud of), I went back to the start room jump pad it launched me but missed the second jump pad landing me on top of  the roof killing me when I didn't touch my keyboard at all.

On the Nova crawler round after killing all of them the round did not end. I found out there was one near the bio-dome near the arch underwater I could not see it, but it was loudest there.