I can't scroll down to new buildings - only farms, marketplaces, barracks and arenas are visible for me. Don't know if it's a bug or my computers fault
It's Unity's webplayer. You need to click inside the game maybe even click on the scroll bar and slide a little. Unity's webplayer has trouble deciding whether or not you are 'focused' inside it. So you need to click inside it to become focused, then you can interact with it. ~Taiga
Maybe :)