Is that the end of the game?

I hadn't played for a while, loaded my game back up, played one level and then it showed a newspaper article saying something about a new machine being discovered that produced clean energy and oil prices were at the lowest ever. The only option I saw from there was exit, so I clicked it, and it took me to the main menu. Was that the end? I didn't think I had played 74 levels...

I looked at the free play levels, looked like many weren't unlocked. If I *had* beaten the game, wouldn't they be unlocked? Started first level of that one just to see what it was, and it appeared to be the same first level of the regular game. What's the difference?

I'm confused, any help would be appreciated!

no thats the begining of the game, I've been playing this all day long and wondering if its gonna end, lol. I think you need to hit next (bottom right tab)

Thanks, I will try again