diff --git a/game/entities/player.tscn b/game/entities/player.tscn
index babbfc9..be7ad5f 100644
--- a/game/entities/player.tscn
+++ b/game/entities/player.tscn
@@ -7,6 +7,8 @@
 script = ExtResource("1_3a8sv")
 
 [node name="Ship" parent="." instance=ExtResource("2_ktqbp")]
+collision_layer = 2
+collision_mask = 21
 size = Vector2(48, 32)
 acceleration = 46
 deceleration = 23
diff --git a/game/entities/ship.tscn b/game/entities/ship.tscn
index a665a63..f0272f1 100644
--- a/game/entities/ship.tscn
+++ b/game/entities/ship.tscn
@@ -7,6 +7,7 @@ height = 20.0
 
 [node name="Ship" type="CharacterBody2D"]
 disable_mode = 1
+collision_layer = 7
 motion_mode = 1
 wall_min_slide_angle = 3.1415927
 script = ExtResource("1_6isjb")
diff --git a/game/entities/weapons/projectiles/abstract_projectile.gd b/game/entities/weapons/projectiles/abstract_projectile.gd
index 31a8821..3edefba 100644
--- a/game/entities/weapons/projectiles/abstract_projectile.gd
+++ b/game/entities/weapons/projectiles/abstract_projectile.gd
@@ -2,6 +2,13 @@ class_name AbstractProjectile
 extends CharacterBody2D
 
 
+const PLAYER_LAYER = 2
+const ENEMY_LAYER = 4
+const PLAYER_PROJECTILE_LAYER = 8
+const ENEMY_PROJECTILE_LAYER = 16
+const PROJECTILE_BORDER_LAYER = 32
+
+
 signal destroyed
 
 
@@ -12,6 +19,20 @@ signal destroyed
 @export var max_distance : int
 @export var max_livetime : int
 
+@export var collide_player: bool:
+	set(value):
+		collide_player = value
+		_apply_collision_mask()
+	get:
+		return collide_player
+
+@export var collide_enemies: bool:
+	set(value):
+		collide_enemies = value
+		_apply_collision_mask()
+	get:
+		return collide_enemies
+
 
 var _traveled_distance: float
 var _livetime: float
@@ -19,10 +40,14 @@ var _livetime: float
 
 func _ready() -> void:
 	velocity = direction.normalized() * speed
+	_apply_collision_mask()
 
 
-func move(delta: float) -> void:
-	position += velocity * delta
+func _physics_process(_delta: float) -> void:
+	var was_collided := move_and_slide()
+	if was_collided:
+		destroyed.emit()
+		queue_free()
 
 
 func process_acceleration(delta: float) -> void:
@@ -46,3 +71,21 @@ func process_livetime(delta: float) -> void:
 	_livetime += delta
 	if _livetime > max_livetime:
 		destroyed.emit()
+
+func _apply_collision_mask() -> void:
+	collision_mask |= PROJECTILE_BORDER_LAYER
+	
+	if collide_player:
+		collision_layer |= ENEMY_PROJECTILE_LAYER
+		collision_mask |= PLAYER_LAYER
+	else:
+		collision_layer &= ~ENEMY_PROJECTILE_LAYER
+		collision_mask &= ~PLAYER_LAYER
+	
+	if collide_enemies:
+		collision_layer |= PLAYER_PROJECTILE_LAYER
+		collision_mask |= ENEMY_LAYER
+	else:
+		collision_layer &= ~PLAYER_PROJECTILE_LAYER
+		collision_mask &= ~ENEMY_LAYER
+	
diff --git a/game/entities/weapons/projectiles/abstract_projectile.tscn b/game/entities/weapons/projectiles/abstract_projectile.tscn
index 65b9eb3..e4a3a2e 100644
--- a/game/entities/weapons/projectiles/abstract_projectile.tscn
+++ b/game/entities/weapons/projectiles/abstract_projectile.tscn
@@ -3,5 +3,7 @@
 [ext_resource type="Script" uid="uid://ctmjb3nkxrepu" path="res://game/entities/weapons/projectiles/abstract_projectile.gd" id="1_4tgfk"]
 
 [node name="AbstractProjectile" type="CharacterBody2D"]
+collision_layer = 0
+collision_mask = 0
 motion_mode = 1
 script = ExtResource("1_4tgfk")
diff --git a/game/entities/weapons/projectiles/gatling_projectile.gd b/game/entities/weapons/projectiles/gatling_projectile.gd
index ee294dd..04d8160 100644
--- a/game/entities/weapons/projectiles/gatling_projectile.gd
+++ b/game/entities/weapons/projectiles/gatling_projectile.gd
@@ -7,7 +7,3 @@ func _ready() -> void:
 	$Sprite2D.texture = texture
 	
 	super._ready()
-
-
-func _physics_process(delta: float) -> void:
-	move(delta)
diff --git a/game/entities/weapons/projectiles/gatling_projectile.tscn b/game/entities/weapons/projectiles/gatling_projectile.tscn
index 2dffcb7..bfeca46 100644
--- a/game/entities/weapons/projectiles/gatling_projectile.tscn
+++ b/game/entities/weapons/projectiles/gatling_projectile.tscn
@@ -1,11 +1,16 @@
-[gd_scene load_steps=3 format=3 uid="uid://cnoiv8hdgossf"]
+[gd_scene load_steps=4 format=3 uid="uid://cnoiv8hdgossf"]
 
 [ext_resource type="Script" uid="uid://rtsf1n0djorp" path="res://game/entities/weapons/projectiles/gatling_projectile.gd" id="1_xq7oi"]
 
 [sub_resource type="PlaceholderTexture2D" id="PlaceholderTexture2D_xq7oi"]
 size = Vector2(4, 4)
 
+[sub_resource type="CircleShape2D" id="CircleShape2D_xq7oi"]
+radius = 1.0
+
 [node name="GatlingProjectile" type="CharacterBody2D"]
+collision_layer = 0
+collision_mask = 0
 motion_mode = 1
 script = ExtResource("1_xq7oi")
 damage = 6
@@ -16,3 +21,4 @@ metadata/_custom_type_script = "uid://ctmjb3nkxrepu"
 texture = SubResource("PlaceholderTexture2D_xq7oi")
 
 [node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+shape = SubResource("CircleShape2D_xq7oi")
diff --git a/game/entities/weapons/weapon.gd b/game/entities/weapons/weapon.gd
index eca3235..9a46cad 100644
--- a/game/entities/weapons/weapon.gd
+++ b/game/entities/weapons/weapon.gd
@@ -2,6 +2,11 @@ class_name Weapon
 extends Node2D
 
 
+enum Belonging { PLAYER, ENEMY }
+
+
+@export var belonging: Belonging
+
 @export var damage : int
 @export var bullet_per_shot : int
 @export var sector_angle : int
@@ -41,10 +46,17 @@ func _ready() -> void:
 
 func shoot() -> void:
 	if not _can_shoot(): return
-	print("shot")
 	
 	var projectile := preload("res://game/entities/weapons/projectiles/gatling_projectile.tscn").instantiate()
-	projectile.direction = Vector2.RIGHT
+	
+	match belonging:
+		Belonging.PLAYER:
+			projectile.direction = Vector2.RIGHT
+			projectile.collide_enemies = true
+		Belonging.ENEMY:
+			projectile.direction = Vector2.LEFT
+			projectile.collide_player = true
+	
 	add_child(projectile)
 	
 	for reloader in reloaders:
diff --git a/game/entities/weapons/weapon.tscn b/game/entities/weapons/weapon.tscn
index 459e213..ee742a9 100644
--- a/game/entities/weapons/weapon.tscn
+++ b/game/entities/weapons/weapon.tscn
@@ -4,5 +4,9 @@
 
 [node name="Weapon" type="Node2D"]
 script = ExtResource("1_4oq3a")
+belonging = null
+damage = null
+bullet_per_shot = null
+sector_angle = null
 
 [node name="Sprite2D" type="Sprite2D" parent="."]
diff --git a/game/passage.tscn b/game/passage.tscn
index 56ffa21..3479b5e 100644
--- a/game/passage.tscn
+++ b/game/passage.tscn
@@ -4,28 +4,58 @@
 
 [sub_resource type="WorldBoundaryShape2D" id="WorldBoundaryShape2D_ltkyg"]
 
-[node name="Passage" type="StaticBody2D"]
+[node name="Passage" type="Node"]
 script = ExtResource("1_ltkyg")
 
-[node name="CollisionTop" type="CollisionShape2D" parent="."]
+[node name="World" type="StaticBody2D" parent="."]
+collision_mask = 0
+
+[node name="CollisionTop" type="CollisionShape2D" parent="World"]
 position = Vector2(320, 0)
 rotation = 3.1415927
 shape = SubResource("WorldBoundaryShape2D_ltkyg")
 one_way_collision = true
 
-[node name="CollisionBottom" type="CollisionShape2D" parent="."]
+[node name="CollisionBottom" type="CollisionShape2D" parent="World"]
 position = Vector2(320, 360)
 shape = SubResource("WorldBoundaryShape2D_ltkyg")
 one_way_collision = true
 
-[node name="CollisionLeft" type="CollisionShape2D" parent="."]
+[node name="CollisionLeft" type="CollisionShape2D" parent="World"]
 position = Vector2(0, 180)
 rotation = 1.5707964
 shape = SubResource("WorldBoundaryShape2D_ltkyg")
 one_way_collision = true
 
-[node name="CollisionRight" type="CollisionShape2D" parent="."]
+[node name="CollisionRight" type="CollisionShape2D" parent="World"]
 position = Vector2(640, 180)
 rotation = -1.5707964
 shape = SubResource("WorldBoundaryShape2D_ltkyg")
 one_way_collision = true
+
+[node name="ProjectileBorder" type="StaticBody2D" parent="."]
+collision_layer = 32
+collision_mask = 0
+
+[node name="CollisionTop" type="CollisionShape2D" parent="ProjectileBorder"]
+position = Vector2(320, -50)
+rotation = 3.1415927
+shape = SubResource("WorldBoundaryShape2D_ltkyg")
+one_way_collision = true
+
+[node name="CollisionBottom" type="CollisionShape2D" parent="ProjectileBorder"]
+position = Vector2(320, 410)
+shape = SubResource("WorldBoundaryShape2D_ltkyg")
+one_way_collision = true
+
+[node name="CollisionLeft" type="CollisionShape2D" parent="ProjectileBorder"]
+position = Vector2(-50, 180)
+rotation = 1.5707964
+shape = SubResource("WorldBoundaryShape2D_ltkyg")
+one_way_collision = true
+
+[node name="CollisionRight" type="CollisionShape2D" parent="ProjectileBorder"]
+position = Vector2(690, 180)
+rotation = -1.5707964
+shape = SubResource("WorldBoundaryShape2D_ltkyg")
+one_way_collision = true
diff --git a/project.godot b/project.godot
index 4a149f7..aa35b52 100644
--- a/project.godot
+++ b/project.godot
@@ -346,7 +346,12 @@ previous_reactor_scheme={
 
 [layer_names]
 
-2d_physics/layer_1="Player"
+2d_physics/layer_1="World"
+2d_physics/layer_2="Player"
+2d_physics/layer_3="Enemy"
+2d_physics/layer_4="PlayerProjectile"
+2d_physics/layer_5="EnemyProjectile"
+2d_physics/layer_6="ProjectileBorder"
 
 [rendering]