Agree.
Our children need the pause button.
Guys, to be honest, who plays at planet mule?
I bet the average age is 35-45 and I bet that the most of us have a family and children (and a wife :-)) that sometimes need immediate attention!
So please, at least in solo mode, add this feature.

Another great feature would be the "save and quit"
The user can save the current game and then automatically quits: then he can reload that saved game only once in order to continue the match.

Btw thanks for your great Planet Mule!
*bows*