To collect stars and other valuable items such as extra lives, ammo, missiles, fuel, and power-ups, simply fly over them or collide with them during your flight.

You will engage in thrilling battles against various enemy aircraft and fighters, each with their own unique attack patterns and strengths.

Yes, you can upgrade your weapons by collecting power-ups scattered throughout the game. These upgrades will help you to better defend yourself against enemy attacks.

There is no explicit limit to the number of extra lives you can obtain. You can continue to collect extra lives by finding them in the game environment.

Fuel is crucial for maintaining your flight. You can refuel by collecting fuel pickups that appear randomly in the game. If you run out of fuel, you will lose a life.

Yes, there are several special power-ups available that can provide temporary boosts such as increased firepower, speed, or invincibility. Keep an eye out for these to gain an advantage over your enemies.

If you crash into an enemy aircraft, you will lose a life. It's important to avoid direct collisions and use your weapons effectively to defeat enemies.

Unfortunately, Sky Warrior 2 Invasion does not support co-op mode. The game is designed for single-player action. However, you can compete with friends on leaderboards to see who gets the highest score.