Clash of the Planets

"Clash of the Planets":
As you look over the solar system in a galaxy, you control a number of the planets (which will be shaded in your green colour), neutral planets ripe for conquest, and red ones owned by the invading force. Each planet as a set amount of 'armies' as you start, and with a swipe of your finger, a number of them will be sent out to attack another planet.
There are some random factors in play, but more armies will generally mean it is easier to weaken and hopefully wipe out all the armies on a planet, at which point it becomes your planet. And you do want to own planets, because over time planets will deliver more armies to replenish your forces. The more planets you have, the more powerful you are. The more powerful you are, the better chance you will have attacking the planets held by the enemy. It's a fight to extinction by the way, the first to wipe out the other is the victor.
Early levels shouldn't prove too much of a challenge as you build up reserves, but the challenge will build up quickly. When you launch an attack, you leave your base planet lightly defended, and that provides opportunities for your enemy (and the same is true when they attack with a swarm of armies, they've just created a weak point on the planet they are departing from).
Use your finger to guide your planets to capture all opposite planets.
Instruction: To attack, drag the arrow from a green planet to an opposite planet.
To occupy a planet, you have to eliminate all enemy troops on that planet, the occupied planet will turn green. To win a level, you must occupy all opposite planets.