i developed a game space shooter i set a condition when player reached

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`i developed a game space shooter i set a condition when player reached 1000 score the game move to next level the problems is when we go to next level my score is begin with zero i
want to start move level with increasing score not started from from zero

Here are two ways you could do that.

Use PlayerPrefs

Before you leave the level, save the score into player prefs. After you load the next level, reload the score.

Have an object marked with DontDestroyOnLoad

All your objects are being destroyed when you load the new scene, including the one that contains the current score. You could create an object that stores information like the score and use DontDestroyOnLoad to make sure it is still around after you load the next scene.