I think the currency is a bit unbalanced, the cost is too much for the amount I recieve per game, it costs 200 to upgrade a unit but I'm only getting 6 gold per game? And even then, the enemy is constantly getting harder, so then I start losing and I can't progress beacuse the income is too little for the cost. I ask if you could please change the price or amount recieved per game, I think it would then be more enjoyable.