fixes

metroidvania/Scenes/Player/MissilesPowerup.gd

@@ -2,4 +2,5 @@ extends Powerup
 
 func _pickup():
 	PlayerStats.missiles_unlocked = true
+	PlayerStats.missiles += 1
 	queue_free()

metroidvania/Scenes/Player/Player.gd

@@ -57,7 +57,17 @@ func assign_world_camera():
 	cameraFollow.remote_path = MainInstances.WorldCamera.get_path()
 
 func _exit_tree():
-	MainInstances.Player = null
+	# We need to check if the player in maininstances is this player instance,
+	# it could be a loaded player and this call is made after the new player
+	# is instanced and set in the MainInstances, so the new player is there and
+	# we set it to null, breaking the game.
+	if MainInstances.Player == self:
+		MainInstances.Player = null
+	
+# This is another solution to the above problem
+# func queue_free():
+# 	MainInstances.Player = null
+# 	.queue_free()
 
 func _physics_process(delta):
 	just_jumped = false

metroidvania/Scenes/Player/PlayerStats.gd

@@ -5,7 +5,7 @@ var max_health = 4
 var health = max_health setget set_health
 var missiles_unlocked = false setget set_missiles_unlocked
 var max_missiles = 3
-var missiles = max_missiles setget set_missiles
+var missiles = 0 setget set_missiles
 
 signal player_health_changed(value)
 signal player_missiles_unlocked(value)