I've seen your game. It looks good and many nice battles can be done, but there comes some time that you just get stuck.
You are about to cross the river and fight the Aztecs and the other enemies, but you eventually can't--if your units are at the enemies' land, they send much of their army and you can do nothing! Only if you build your village and create much army with the single and only villager you gain from Portugals will you manage to win.
There should be alternatives in order to achieve winning or even making the enemies being less brutal.