Tips and Tricks
The two most important upgrades are the firing rate and the speed of your arrows. Both of these will allow you to shoot far more quickly, which is especially helpful when armored Martians begin attacking you.
The ice path spell is especially good for slowing down the Martians on vehicles.
Zeus’ lightning should be saved for when you get in real trouble and have tons of Martians on the screen.
You can find a surprising amount of crystals within the game itself for free. Normally you will earn them for beating a stage without taking any damage.
Crystals can often be found in the bonus blocks that pop up onstage every once in a while, as can large amounts of coins.
Spending your crystals on permanent power ups that increase the amount of coins that you get from each bonus box is a smart idea.
You can unlock secret stages as you collect more pots of gold. When you are in the world select screen, scroll six spaces to the right and you will find the secret levels. Each 30 pots of gold that you collect unlocks one secret level. There are a total of 10 secret levels in the game.
Hit the rainbow colored blocks any time that you see them. The rainbow blocks are far more likely to contain valuable goods, such as extra lives or extra hit points.