I feel the demo is rather buggy. I played through 2 campaigns and after accomplishing all my objectives in the second one, the game kept on going and going and going...I had like almost 20,000 of each resources from the trading posts and plantation. I double checked to see if I was missing something, nope. Every one of my enemy is slaughtered, and all my objectives are checked off. You can't delete buildings or kill off your own troops when selecting them all at once like in AoE2 so that sucks. I don't know if this will carry over into the demo.
Is it me or does this game don't have a Save button? Nevermind. The trial version doesn't allow you to Save your games. Just found out...