Answer:
I am heavy forward, but backward I'm not. What am I?
I work when I play and play when I work
In a tunnel of darkness lies a beast of iron. I can only attack when pulled back. What am I?
My first is in window but not in pane. My second's in road but not in lane. My third is in oval but not in round. My fourth is in hearing but not in sound. My whole is known as a sign of peace. And from noah's ark won quick release.
I am all around, yet to me you are half blind. Sunlight makes me invisible and difficult to find. What am I?
You can always see it, but it's too far away to touch. Mountains rest on it, and at sea it surrounds you. What is it?