Each weapon of has a corresponding brush gesture that you have to do first before you can spawn that specific god power or weapon. You can make upgrades in between battles. Also, sending in early of the next wave of enemies will give you mana bonus. Some defense units and other upgrades will be available as you progress in the game. Meanwhile, here is (HY) Hell Yeah! walkthrough video showing how to beat the boss in Italy level. We will try to cover the rest of the boss level including New York, London and other levels if we find time.
