Fixed debugger errors in many files and optimized some scenes/code

Enemies/Snowman Enemy Blue.gd

@@ -1,47 +1,49 @@
 extends KinematicBody2D
 
-onready var SNOWBALL_BLUE_SCENE = preload("res://Enemies/Snowball Blue.tscn")
+onready var SNOWBALL_BLUE_SCENE: Resource = preload('res://Enemies/Snowball Blue.tscn')
 
-var player = null
-var move = Vector2.ZERO
-var speed = .5
+var player: KinematicBody2D = null
+var velocity: Vector2 = Vector2.ZERO
+const SPEED: int = 50
 var health: int = 2
 
 
-func _physics_process(delta: float) -> void:
-    move = Vector2.ZERO
+func _physics_process(_delta: float) -> void:
+    velocity = Vector2.ZERO
 
-    if player != null:
-        move = position.direction_to(player.position) * speed
-    else:
-        move = Vector2.ZERO
-
-    move = move.normalized()
-    move = move_and_collide(move)
+    if player and position.distance_to(player.position) > 1:
+        velocity = position.direction_to(player.position).normalized() * SPEED
 
+    velocity = move_and_slide(velocity)
+    return
 
 
 func _on_Area2D_body_entered(body: Node) -> void:
     if body != self && !(body.name.begins_with("tree")) && !(body.name.begins_with("snowmen_enemy")) && !(body.name.begins_with("wall")):
         player = body
+    return
 
 
 func _on_Area2D_body_exited(body: Node) -> void:
     if !(body.name.begins_with("tree")) && !(body.name.begins_with("snowmen_enemy")) && !(body.name.begins_with("wall")):
         player = null
+    return
 
 
-func fire():
+func fire() -> void:
     var snowball = SNOWBALL_BLUE_SCENE.instance()
     snowball.position = get_global_position()
     snowball.player = player
     get_parent().add_child(snowball)
     $Timer.set_wait_time(1)
+    return
 
 
 func _on_Timer_timeout() -> void:
     if player != null:
         fire()
+    return
+
 
 func _on_player_detector_area_entered(area: Area2D) -> void:
     if area.get_parent().name == 'Player':
@@ -49,10 +51,11 @@ func _on_player_detector_area_entered(area: Area2D) -> void:
     return
 
 
-func _on_player_detector_area_exited(_area: Area2D):
+func _on_player_detector_area_exited(_area: Area2D) -> void:
     player = null
     return
 
+
 func _on_hitbox_area_entered(area: Area2D) -> void:
     if area.is_in_group('player_weapon_1'):
         health -= 1