Open the Player scene

Add two AudioStreamPlayer nodes

Name them LaserSound and EngineSound

Add the respective sounds to the Stream Property

Update the shoot function

To player the laser sound

Update the get input function

To play the engine sound

ONLY when thrusting

If the player dies while holding the thrust key - the sound will never turn off.

Fix this by updating DEAD state in change state function

Open Main Scene

Add three AudioStreamPlayer nodes named

ExplosionSound

LevelupSound

Music

Set up the Stream properties

With the approptiate files

Update the rock exploded function

To play ExplosionSound

Update the new level function

To play level up sound

Update the new game function

To start the music

Update the game over function

To stop the music

Set their Stream Property

Update the shoot function

To play the shoot sound

Update the explode function

To play the explosion sound