Agreed with the last guy.
There really is no point to playing this. It becomes impossible after the second level. The soldiers and archers die way before even getting to the castle. The knights and rams cost too much. There's no way to earn gold while playing, you have to beat a freaking level in order to get anything. And on top of that, the power ups are useless. Buying them will waste your gold and screw you over in the next level. I had to restart the freaking game because I spent gold on upgrades and my soldiers died before even touching the castle. Then I don't have enough gold to buy more. Lower the costs, make the warriors stronger, make the castles weaker, make some way to get gold while playing.