please I have been stuck fo days are you suposted to do some sore of titanic under the green line

For some reason the game ignores every input in levels besides esc to open/close the pause menu

Are all achievements do-able offline or are there online achievements? Thanks.

Loving the game,I had the idea to suggest a timer,So it's not just down to the shots,A bonus for time to complete perhaps? That would make it much more annoying!!

As soon as I load into a level everything just stops working. I cant move the camera, I cant press play, I cant place any objects. Only thing I can do is press escape to open and close the pause menu, I cant interact with the pause menu either.