Volcannon

Volcannon is an addictive arcade game that allows you to use cannons to fight an erupting volcano that throws volcanic bombs at your castle.
Blast away the rock balls and save your castle from being destroyed.

Each volcanic bomb ball contains a number that denotes the damage it can cause to your castle. You might have to hit the bomb balls multiple times using the cannonballs to destroy them. Sometimes these volcanic balls will breakdown into smaller balls on hitting with the cannon. You can target them next.
When you destroy the volcanic bomb balls, you will receive coins.

Your cannon is fixed at the center, adjacent to the castle. You can swipe below the cannon to align it and shoot. You must calculate the trajectory of the bomb balls and blast them off, preventing them from hitting the castle.

Your castle has associated health and can take only a few hits before getting destroyed.

As you collect more coins, you will be able to upgrade the cannons and the castle so that you can survive longer.
You also have a money tree with you that will generate coins for you even when you are not playing.

Upgrades:
Castle - Upgrade Health(HLT) to survive more hits
Cannon - Upgrade Damage Per Second(DPS) to blast bigger bomb balls easier