Save the music position to resume

... instead of playing from the beginning.

Main.gd

@@ -3,6 +3,7 @@ extends Node2D
 export (PackedScene) var Mob
 
 var score = 0
+var music_position = 0.0
 
 func new_game():
 	score = 0
@@ -10,12 +11,15 @@ func new_game():
 	$StartTimer.start()
 	$HUD.update_score(score)
 	$HUD.show_message("Get ready")
-	$Music.play()
+	$Music.play(music_position)
 
 func game_over():
 	$ScoreTimer.stop()
 	$MobTimer.stop()
+
 	$HUD.show_game_over()
+
+	music_position = $Music.get_playback_position()
 	$Music.stop()
 	$DeathSound.play()