You can control your spacecraft using the arrow keys or WASD on your keyboard for movement, and the spacebar for firing at the incoming alien ships.

If an alien ship successfully lands on Earth, it will start damaging or destroying Earth's structures, which will reduce your chances of winning the game.

Yes, there are various types of alien ships with different attack patterns and strengths. It's important to adapt your strategy accordingly.

Throughout the game, you can find power-ups that allow you to upgrade your spacecraft's weapons or defensive capabilities.

The main objective is to prevent alien invaders from landing on Earth by destroying their ships before they reach the ground, thus protecting Earth's structures from destruction.

Yes, there is a limit to the number of buildings that can be damaged or destroyed. Once too many buildings are lost, you will lose the game.

There are occasional bonus rounds where you can earn extra points by completing specific tasks, adding more excitement to the gameplay.

To improve your score, focus on efficiently eliminating alien ships and avoid unnecessary damage to Earth's structures. Additionally, collecting power-ups and completing objectives within bonus rounds can significantly boost your score.