diff --git a/vegeconda/door.gd b/vegeconda/door.gd
index 0dd35e3..31eb3ac 100644
--- a/vegeconda/door.gd
+++ b/vegeconda/door.gd
@@ -10,12 +10,12 @@ enum DoorState {OPENED, CLOSED, OPENING, CLOSING}
 @export var state: DoorState
 
 
-var ANIMATIONS_BY_TYPE : Dictionary = {
+const ANIMATIONS_BY_TYPE := {
     DoorType.BOTTOM_DOOR: "bottom_door",
     DoorType.TOP_DOOR: "top_door",
 }
 
-var ANIMATIONS_BY_STATE : Dictionary = {
+const ANIMATIONS_BY_STATE := {
     DoorState.OPENED: "opened",
     DoorState.CLOSED: "closed",
     DoorState.OPENING: "opening",
@@ -33,7 +33,7 @@ func _ready() -> void:
 
 
 func _play_animation() -> void:
-    var animation : String = "%s_%s" % [
+    var animation := "%s_%s" % [
         ANIMATIONS_BY_TYPE[type], 
         ANIMATIONS_BY_STATE[state]
     ]
diff --git a/vegeconda/level.gd b/vegeconda/level.gd
index 4767fb1..c0234b9 100644
--- a/vegeconda/level.gd
+++ b/vegeconda/level.gd
@@ -1,37 +1,37 @@
 extends Node2D
 
-@export_range(2, 17) var top_door_x: int = 2
-@export_range(2, 17) var bottom_door_x: int = 2
+@export_range(2, 17) var top_door_x := 2
+@export_range(2, 17) var bottom_door_x := 2
 
 
-const DOOR = preload("res://door.tscn")
+const DOOR := preload("res://door.tscn")
 
 
-const TOP_LEFT_FOREST = Vector2i(0,0)
-const TOP_RIGHT_FOREST = Vector2i(3,0)
-const BOTTOM_LEFT_FOREST = Vector2i(0,3)
-const BOTTOM_RIGHT_FOREST = Vector2i(3,3)
+const TOP_LEFT_FOREST := Vector2i(0,0)
+const TOP_RIGHT_FOREST := Vector2i(3,0)
+const BOTTOM_LEFT_FOREST := Vector2i(0,3)
+const BOTTOM_RIGHT_FOREST := Vector2i(3,3)
 
-const TOP_FORESTS = [ Vector2i(1,0), Vector2i(2,0), Vector2i(1,1), Vector2i(2,1) ]
-const BOTTOM_FORESTS = [ Vector2i(1,2), Vector2i(2,2), Vector2i(1,3), Vector2i(2,3) ]
+const TOP_FORESTS := [ Vector2i(1,0), Vector2i(2,0), Vector2i(1,1), Vector2i(2,1) ]
+const BOTTOM_FORESTS := [ Vector2i(1,2), Vector2i(2,2), Vector2i(1,3), Vector2i(2,3) ]
 
-const LEFT_FORESTS = [ Vector2i(0,1), Vector2i(0,2) ]
-const RIGHT_FORESTS = [ Vector2i(3,1), Vector2i(3,2) ]
+const LEFT_FORESTS := [ Vector2i(0,1), Vector2i(0,2) ]
+const RIGHT_FORESTS := [ Vector2i(3,1), Vector2i(3,2) ]
 
-const TOP_LEFT_DOOR = Vector2i(4,2)
-const TOP_RIGHT_DOOR = Vector2i(4,3)
-const BOTTOM_LEFT_DOOR = Vector2i(4,0)
-const BOTTOM_RIGHT_DOOR = Vector2i(4,1)
+const TOP_LEFT_DOOR := Vector2i(4,2)
+const TOP_RIGHT_DOOR := Vector2i(4,3)
+const BOTTOM_LEFT_DOOR := Vector2i(4,0)
+const BOTTOM_RIGHT_DOOR := Vector2i(4,1)
 
 
-const CORNER_FIELDS = [ Vector2i(4,2), Vector2i(4,3) ]
-const TOP_FIELDS = [
+const CORNER_FIELDS := [ Vector2i(4,2), Vector2i(4,3) ]
+const TOP_FIELDS := [
     Vector2i(0,2), Vector2i(1,2), Vector2i(2,2), Vector2i(0,3), Vector2i(1,3), Vector2i(2,3),
 ]
-const LEFT_FIELDS = [
+const LEFT_FIELDS := [
     Vector2i(3,0), Vector2i(4,0), Vector2i(3,1), Vector2i(4,1), Vector2i(3,2), Vector2i(3,3),
 ]
-const CENTER_FIELDS = [
+const CENTER_FIELDS := [
     Vector2i(0,0), Vector2i(1,0), Vector2i(2,0), Vector2i(0,1), Vector2i(1,1), Vector2i(2,1),
 ]
 
@@ -78,8 +78,8 @@ func _create_field() -> void:
         for j in range(2, 10):
             $TileMapLayer.set_cell(Vector2i(i,j), 1, CENTER_FIELDS[randi() % CENTER_FIELDS.size()])
 
-func _create_top_door():
-    const y = 0
+func _create_top_door() -> void:
+    const y := 0
     $TileMapLayer.set_cell(Vector2i(top_door_x-1,y), 0, TOP_LEFT_DOOR)
     $TileMapLayer.set_cell(Vector2i(top_door_x,y), 1, LEFT_FIELDS[randi() % LEFT_FIELDS.size()])
     $TileMapLayer.set_cell(Vector2i(top_door_x,y+1), 1, CENTER_FIELDS[randi() % LEFT_FIELDS.size()])
@@ -98,7 +98,7 @@ func _create_top_door():
     $CollisionBoxTopRight.position.x -= $CollisionBoxTopRight.shape.size.x/2 - 8
 
 
-func _create_bottom_door():
+func _create_bottom_door() -> void:
     const y = 10
     $TileMapLayer.set_cell(Vector2i(bottom_door_x-1,y), 0, BOTTOM_LEFT_DOOR)
     $TileMapLayer.set_cell(Vector2i(bottom_door_x,y), 1, LEFT_FIELDS[randi() % LEFT_FIELDS.size()])
@@ -110,9 +110,30 @@ func _create_bottom_door():
     bottom_door.position = Vector2i(bottom_door_x,y)*16
     add_child(bottom_door)
     
-    
     $CollisionBoxBottomLeft.shape.size.x = (bottom_door_x - 1) * 16
     $CollisionBoxBottomLeft.position.x += $CollisionBoxBottomLeft.shape.size.x/2 - 8
     
     $CollisionBoxBottomRight.shape.size.x = (20 - bottom_door_x - 2) * 16
     $CollisionBoxBottomRight.position.x -= $CollisionBoxBottomRight.shape.size.x/2 - 8
+
+
+func open_top_door() -> void:
+    if top_door:
+        top_door.open()
+    
+    
+func close_top_door() -> void:
+    if top_door:
+        top_door.close()
+    
+    
+func open_bottom_door() -> void:
+    if bottom_door:
+        bottom_door.open()
+    
+    
+func close_bottom_door() -> void:
+    if bottom_door:
+        bottom_door.close()
+    
+    
diff --git a/vegeconda/pickup.gd b/vegeconda/pickup.gd
index 4b31162..05b4e2b 100644
--- a/vegeconda/pickup.gd
+++ b/vegeconda/pickup.gd
@@ -4,20 +4,20 @@ extends StaticBody2D
 
 
 enum PickupType {CHERRY, FLY_AGARIC, GREEN_APPLE, RED_APPLE}
-@export var type: PickupType
+@export var type: PickupType = PickupType.RED_APPLE
 
 enum PickupState {PREPARING, SHOWING_UP, IDLING, HIGHLIGHTING}
 @export var state: PickupState = PickupState.PREPARING
 
 
-var ANIMATIONS_BY_TYPE : Dictionary = {
+const ANIMATIONS_BY_TYPE := {
     PickupType.CHERRY: "cherry",
     PickupType.FLY_AGARIC: "fly_agaric",
     PickupType.GREEN_APPLE: "green_apple",
     PickupType.RED_APPLE: "red_apple",
 }
 
-var ANIMATIONS_BY_STATE : Dictionary = {
+const ANIMATIONS_BY_STATE := {
     PickupState.PREPARING: "preparing",
     PickupState.SHOWING_UP: "showing_up",
     PickupState.IDLING: "idling",