@tonkachuck Hmmm, probably a bug or something. Try reloading the game. If you still cannot attack, post feedack on developer's profile or on forum threads. Mods will probably notice it
I just started playing the game.
It's addictive and takes some more time than I expected. A wrong move in the game will lead to stalemate (e.g. when you haven't been defeated but have no more Hut neither resources to build one and such things).