It's recommended to play levels more often to gather gold for the important tower upgrades, even when we have 3 stars already, because in the later levels we need powerful towers to beat them. We can only place the towers on given spots within the levels. There are different towers with pros and cons. After each level we can use the gold to buy important upgrades for the towers.
tags: tower, defense, defence, upgrades, levels, gold, waves Similiar games of the category Tower Defense,