Player gun, bullet and its collisiions. Refactor.

metroidvania/Scenes/Enemies/WalkingEnemy.tscn

@@ -0,0 +1,79 @@
+[gd_scene load_steps=7 format=2]
+
+[ext_resource path="res://Scenes/Enemies/WalkingEnemy.gd" type="Script" id=1]
+[ext_resource path="res://Assets/Enemies/WalkingEnemy.png" type="Texture" id=2]
+[ext_resource path="res://Scenes/Enemies/Enemy.tscn" type="PackedScene" id=3]
+
+[sub_resource type="RectangleShape2D" id=1]
+extents = Vector2( 2, 6 )
+
+[sub_resource type="Animation" id=2]
+resource_name = "Walking"
+loop = true
+tracks/0/type = "value"
+tracks/0/path = NodePath("../WalkingEnemy/Sprite:frame")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/keys = {
+"times": PoolRealArray( 0, 0.5 ),
+"transitions": PoolRealArray( 1, 1 ),
+"update": 1,
+"values": [ 0, 1 ]
+}
+
+[sub_resource type="RectangleShape2D" id=3]
+extents = Vector2( 7, 6 )
+
+[node name="WalkingEnemy" instance=ExtResource( 3 )]
+script = ExtResource( 1 )
+MAX_SPEED = 15
+
+[node name="Sprite" parent="." index="0"]
+position = Vector2( 0, -9 )
+texture = ExtResource( 2 )
+flip_h = true
+hframes = 2
+
+[node name="Collider" parent="." index="1"]
+position = Vector2( 0, -6 )
+shape = SubResource( 1 )
+
+[node name="AnimationPlayer" parent="." index="2"]
+autoplay = "Walking"
+anims/Walking = SubResource( 2 )
+
+[node name="FloorRight" type="RayCast2D" parent="." index="3"]
+position = Vector2( 2, -1 )
+enabled = true
+cast_to = Vector2( 0, 7 )
+collision_mask = 2
+
+[node name="FloorLeft" type="RayCast2D" parent="." index="4"]
+position = Vector2( -2, -1 )
+enabled = true
+cast_to = Vector2( 0, 7 )
+collision_mask = 2
+
+[node name="WallRight" type="RayCast2D" parent="." index="5"]
+position = Vector2( 0, -8 )
+enabled = true
+cast_to = Vector2( 6, 0 )
+collision_mask = 2
+
+[node name="WallLeft" type="RayCast2D" parent="." index="6"]
+position = Vector2( 0, -8 )
+enabled = true
+cast_to = Vector2( -6, 0 )
+collision_mask = 2
+
+[node name="Hurtbox" parent="." index="7"]
+collision_layer = 8
+collision_mask = 0
+
+[node name="Collider" parent="Hurtbox" index="0"]
+position = Vector2( 0, -7 )
+shape = SubResource( 3 )
+
+[editable path="Hurtbox"]