Destroy all enemies and move carefully to avoid any collision between your ship and enemy missiles, ships or other objects that could destroy your ship.
Enemies attack in waves. In each wave, enemy ships arrive in small groups and you must destroy them as quickly as possible because another group of enemies is already approaching. Once a small group of enemies is launched, you are given a time limit by which the enemies must be destroyed. After this time limit expires, a new group of enemies will fly in and if you don't manage to destroy all the enemies from the last group, the enemies will keep increasing and you will soon be facing a large force that will be hard to defeat.
In the game you can encounter several types of enemies with different characteristics (movement speed, shooting speed, ..).
You control the ship with the buttons on the right and left side of the screen.
On the right side of the screen are buttons that control the movement of the ship. You can fly the ship forward in the direction it is currently facing, or you can turn it to the right or left.
A ship that is in motion cannot be stopped because it has no brake. Once the ship is in motion, it stays in motion and glides in one direction. You must turn the boat in one direction and start moving forward in the new direction. So you have to be very careful and manipulate the boat so as not to collide.
On the right side of the screen there are buttons that control the firing of the missiles. There is no limit to the number of rockets, but there is a maximum number of rockets (8 rockets) that can be fired in one burst.
If you only fire 3 rockets in a batch, you will still have 5 rockets left. You can fire these rockets without waiting or you can wait and fire the rockets again and you will soon have all 8 rockets ready to fire.
If you fire all 8 rockets, the next rocket will be fired after it is ready to fire. This will significantly slow down the firing of the next missiles. It is therefore advisable to shoot judiciously so that you do not run out of rockets at an inopportune time.