Add final progression to tiny sword, fixes and tweeks required

docs/gyms/tiny_sword/buildings/alchemy_tower/alchemy_tower.gd

@@ -1,6 +1,8 @@
 class_name AlchemyTower
 extends Node2D
 
+const UNLOCK_GOAL_ID: StringName = &"gold_2M_food_200k_wood_200k"
+
 ## Emitted when production progress changes (0.0 to 1.0)
 signal production_progress_updated(progress: float)
 ## Emitted when magic gold balance changes
@@ -16,6 +18,8 @@ signal production_completed(amount: BigNumber)
 ## Reference to game state
 @onready var game_state: LevelGameState = find_parent("LevelGameState")
 @onready var _alchemy_currencies_panel: AlchemyCurrenciesPanel = $AlchemyCurrenciesPanel
+@onready var _sprite: Sprite2D = $Sprite2D
+@onready var _area: Area2D = $Area2D
 
 ## Current production state
 var production_time_elapsed: float = 0.0
@@ -36,17 +40,23 @@ func _ready() -> void:
 	# Initialize production time
 	current_production_time = data.base_production_time_seconds
 	
-	# Register this tower as an available generator
-	game_state.set_generator_available(get_generator_id(), true)
+	# Hide tower until unlock goal is completed
+	_sprite.visible = false
+	_area.monitoring = false
 	
 	# Connect to magic gold balance changes
 	game_state.currency_changed.connect(_on_currency_changed)
+	game_state.goal_completed.connect(_on_goal_completed)
 	
 	# Connect panel signals if available
 	if alchemy_panel:
 		alchemy_panel.craft_requested.connect(_on_craft_requested)
 		alchemy_panel.alchemy_workers_changed.connect(_on_alchemy_workers_changed)
 	
+	# If goal was already completed in a previous session, unlock immediately
+	if game_state.is_goal_completed(UNLOCK_GOAL_ID):
+		_unlock_tower()
+	
 	# Initial progress update
 	production_progress_updated.emit(0.0)
 
@@ -200,3 +210,15 @@ func _on_area_2d_mouse_entered() -> void:
 
 func _on_area_2d_mouse_exited() -> void:
 	_alchemy_currencies_panel.visible = false
+
+
+func _on_goal_completed(goal_id: StringName) -> void:
+	if goal_id == UNLOCK_GOAL_ID:
+		_unlock_tower()
+
+
+func _unlock_tower() -> void:
+	_sprite.visible = true
+	_area.monitoring = true
+	game_state.set_generator_available(get_generator_id(), true)
+	game_state.register_generator(get_generator_id(), true, true, 1)

docs/gyms/tiny_sword/buildings/alchemy_tower/alchemy_tower.tscn

@@ -26,10 +26,10 @@ shape = SubResource("RectangleShape2D_8pntr")
 
 [node name="AlchemyCurrenciesPanel" parent="." unique_id=731368154 instance=ExtResource("2_8pntr")]
 visible = false
-offset_left = 65.0
-offset_top = -75.0
-offset_right = 65.0
-offset_bottom = -75.0
+offset_left = 44.0
+offset_top = -81.0
+offset_right = 444.0
+offset_bottom = 219.0
 currency = ExtResource("7_b8p5n")
 craft_recipes = ExtResource("5_recipes")
 

docs/gyms/tiny_sword/buildings/barracks/Barracks.png.import

@@ -0,0 +1,40 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://cx11iodvbcfb1"
+path="res://.godot/imported/Barracks.png-6c10bd8efd919b8eb03e40d568e18cf1.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://docs/gyms/tiny_sword/buildings/barracks/Barracks.png"
+dest_files=["res://.godot/imported/Barracks.png-6c10bd8efd919b8eb03e40d568e18cf1.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/uastc_level=0
+compress/rdo_quality_loss=0.0
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/channel_remap/red=0
+process/channel_remap/green=1
+process/channel_remap/blue=2
+process/channel_remap/alpha=3
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

docs/gyms/tiny_sword/buildings/barracks/barracks.gd

@@ -0,0 +1,25 @@
+extends Node2D
+
+const UNLOCK_GOAL_ID: StringName = &"gold_50M_food_5M_wood_5M"
+
+@onready var _sprite: Sprite2D = $Sprite2D
+@onready var _area: Area2D = $Area2D
+@onready var _game_state: LevelGameState = find_parent("LevelGameState")
+
+
+func _ready() -> void:
+	_sprite.visible = false
+	_area.monitoring = false
+	_game_state.goal_completed.connect(_on_goal_completed)
+	if _game_state.is_goal_completed(UNLOCK_GOAL_ID):
+		_unlock()
+
+
+func _on_goal_completed(goal_id: StringName) -> void:
+	if goal_id == UNLOCK_GOAL_ID:
+		_unlock()
+
+
+func _unlock() -> void:
+	_sprite.visible = true
+	_area.monitoring = true

docs/gyms/tiny_sword/buildings/barracks/barracks.gd.uid

@@ -0,0 +1 @@
+uid://xk7d3maod6uc

docs/gyms/tiny_sword/buildings/barracks/barracks.tscn

@@ -0,0 +1,40 @@
+[gd_scene format=3 uid="uid://cyvijgwj6l8vg"]
+
+[ext_resource type="PackedScene" uid="uid://jeoiinukrrsp" path="res://core/generator/currency_generator.tscn" id="1_gen"]
+[ext_resource type="Script" uid="uid://xk7d3maod6uc" path="res://docs/gyms/tiny_sword/buildings/barracks/barracks.gd" id="1_script"]
+[ext_resource type="Resource" path="res://docs/gyms/tiny_sword/currencies/unit.tres" id="2_unit"]
+[ext_resource type="Resource" path="res://docs/gyms/tiny_sword/buildings/barracks/barracks_generator.tres" id="3_data"]
+[ext_resource type="Texture2D" uid="uid://cx11iodvbcfb1" path="res://docs/gyms/tiny_sword/buildings/barracks/Barracks.png" id="4_ud3ae"]
+[ext_resource type="PackedScene" uid="uid://ckos7f22pnmyh" path="res://core/generator/generator_container.tscn" id="5_panel"]
+
+[sub_resource type="RectangleShape2D" id="RectangleShape2D_barracks"]
+size = Vector2(160, 175)
+
+[node name="Barracks" type="Node2D" unique_id=1061432510]
+script = ExtResource("1_script")
+
+[node name="CurrencyGenerator" parent="." unique_id=427948318 node_paths=PackedStringArray("info_generator_container") instance=ExtResource("1_gen")]
+currency = ExtResource("2_unit")
+data = ExtResource("3_data")
+press_buys_generator = false
+info_generator_container = NodePath("../GeneratorContainer")
+
+[node name="Sprite2D" type="Sprite2D" parent="." unique_id=1503773416]
+texture = ExtResource("4_ud3ae")
+
+[node name="Area2D" type="Area2D" parent="." unique_id=1808028142]
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Area2D" unique_id=614030143]
+position = Vector2(1, 19.5)
+shape = SubResource("RectangleShape2D_barracks")
+
+[node name="GeneratorContainer" parent="." unique_id=1905754561 node_paths=PackedStringArray("_generator") instance=ExtResource("5_panel")]
+visible = false
+offset_left = 138.0
+offset_top = -100.0
+offset_right = 402.0
+offset_bottom = 110.0
+_generator = NodePath("../CurrencyGenerator")
+
+[connection signal="mouse_entered" from="Area2D" to="CurrencyGenerator" method="_on_area_2d_mouse_entered"]
+[connection signal="mouse_exited" from="Area2D" to="CurrencyGenerator" method="_on_area_2d_mouse_exited"]

docs/gyms/tiny_sword/buildings/barracks/barracks_generator.tres

@@ -0,0 +1,18 @@
+[gd_resource type="Resource" script_class="CurrencyGeneratorData" format=3]
+
+[ext_resource type="Script" path="res://core/generator/currency_generator_data.gd" id="1_data"]
+[ext_resource type="Resource" path="res://docs/gyms/tiny_sword/currencies/worker.tres" id="2_worker"]
+[ext_resource type="Resource" path="res://docs/gyms/tiny_sword/goals/gold_50M_food_5M_wood_5M_goal.tres" id="3_goal"]
+
+[resource]
+script = ExtResource("1_data")
+id = &"barracks"
+name = "Barracks"
+starts_unlocked = false
+starts_available = false
+initial_owned = 1
+purchase_currency = ExtResource("2_worker")
+unlock_goal = ExtResource("3_goal")
+initial_cost = 1.0
+coefficient = 1.0
+initial_productivity = 1.0

docs/gyms/tiny_sword/buildings/castle/castle.gd

@@ -1,20 +1,26 @@
 extends Node2D
 
+const PRESTIGE_GOAL_ID: StringName = &"gold_350k_wood_20k"
+
 @onready var _prestige_panel: PrestigePanel = $PrestigePanel
+@onready var game_state: LevelGameState = find_parent("LevelGameState")
+
 
-# Called when the node enters the scene tree for the first time.
 func _ready() -> void:
-	pass # Replace with function body.
+	if game_state:
+		game_state.goal_completed.connect(_on_goal_completed)
 
 
-# Called every frame. 'delta' is the elapsed time since the previous frame.
-func _process(delta: float) -> void:
-	pass
-
 func _on_area_2d_mouse_entered() -> void:
-	## TODO: remove this comment to enable prestige panel
-	#_prestige_panel.visible = true
-	pass
+	if game_state and game_state.is_goal_completed(PRESTIGE_GOAL_ID):
+		_prestige_panel.visible = true
+
 
 func _on_area_2d_mouse_exited() -> void:
 	_prestige_panel.visible = false
+
+
+func _on_goal_completed(goal_id: StringName) -> void:
+	if goal_id == PRESTIGE_GOAL_ID:
+		# Prestige is now unlocked — panel will show on next hover.
+		pass

docs/gyms/tiny_sword/buildings/devil_idol/Castle.png.import

@@ -0,0 +1,40 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://rpedoq4102to"
+path="res://.godot/imported/Castle.png-abe84e074a7668619903091d591ffce7.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://docs/gyms/tiny_sword/buildings/devil_idol/Castle.png"
+dest_files=["res://.godot/imported/Castle.png-abe84e074a7668619903091d591ffce7.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/uastc_level=0
+compress/rdo_quality_loss=0.0
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/channel_remap/red=0
+process/channel_remap/green=1
+process/channel_remap/blue=2
+process/channel_remap/alpha=3
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

docs/gyms/tiny_sword/buildings/devil_idol/devil_idol.gd

@@ -0,0 +1,135 @@
+class_name DevilIdol
+extends Node2D
+
+const UNLOCK_GOAL_ID: StringName = &"gold_50M_food_5M_wood_5M"
+const SAVE_KEY: String = "devil_idol_state"
+const HP_KEY: String = "current_hp"
+
+## Emitted when the idol takes damage.
+signal idol_damaged(current_hp: BigNumber, max_hp: BigNumber)
+## Emitted when the idol is destroyed (one-time win condition).
+signal idol_destroyed()
+
+## Maximum HP mantissa.
+@export var max_hp_mantissa: float = 1.0
+## Maximum HP exponent (default 1e12 = 1 trillion).
+@export var max_hp_exponent: int = 12
+
+@onready var game_state: LevelGameState = find_parent("LevelGameState")
+@onready var _sprite: Sprite2D = $Sprite2D
+@onready var _area: Area2D = $Area2D
+@onready var _panel: PanelContainer = $IdolPanel
+@onready var _hp_value: Label = $IdolPanel/MarginContainer/VBoxContainer/HPValue
+@onready var _damage_button: Button = $IdolPanel/MarginContainer/VBoxContainer/DamageButton
+@onready var _victory_label: Label = $IdolPanel/MarginContainer/VBoxContainer/VictoryLabel
+
+var _max_hp: BigNumber
+var _current_hp: BigNumber
+var _is_targetable: bool = false
+var _is_destroyed: bool = false
+
+
+func _ready() -> void:
+	assert(game_state != null, "DevilIdol: LevelGameState parent not found")
+
+	_max_hp = BigNumber.new(max_hp_mantissa, max_hp_exponent)
+	_current_hp = BigNumber.new(max_hp_mantissa, max_hp_exponent)
+
+	# Load persisted HP from save data
+	_load_state()
+
+	# Panel hidden by default; shown on hover if unlocked
+	_panel.visible = false
+	_victory_label.visible = false
+	_damage_button.pressed.connect(_on_damage_button_pressed)
+
+	# Connect to goal completion for unlocking
+	game_state.goal_completed.connect(_on_goal_completed)
+
+	# If goal was already completed in a previous session, unlock immediately
+	if game_state.is_goal_completed(UNLOCK_GOAL_ID):
+		_unlock_idol()
+
+	_update_ui()
+
+
+func _on_area_2d_mouse_entered() -> void:
+	if _is_targetable and not _is_destroyed:
+		_panel.visible = true
+
+
+func _on_area_2d_mouse_exited() -> void:
+	_panel.visible = false
+
+
+func _on_goal_completed(goal_id: StringName) -> void:
+	if goal_id == UNLOCK_GOAL_ID:
+		_unlock_idol()
+
+
+func _unlock_idol() -> void:
+	_is_targetable = true
+
+
+func _on_damage_button_pressed() -> void:
+	if _is_destroyed:
+		return
+
+	var unit_balance: BigNumber = game_state.get_currency_amount_by_id(&"unit")
+	if unit_balance.mantissa <= 0.0:
+		return
+
+	# Spend all available units as damage
+	var damage: BigNumber = BigNumber.new(unit_balance.mantissa, unit_balance.exponent)
+	if game_state.spend_currency_by_id(&"unit", damage):
+		_current_hp = _current_hp.subtract(damage)
+		if _current_hp.mantissa <= 0.0:
+			_current_hp = BigNumber.new(0.0, 0)
+			_is_destroyed = true
+			idol_destroyed.emit()
+			_victory_label.visible = true
+			_panel.visible = true
+
+		idol_damaged.emit(_current_hp, _max_hp)
+		_save_state()
+		_update_ui()
+
+
+func _update_ui() -> void:
+	if _is_destroyed:
+		_hp_value.text = "0 / %s  —  DESTROYED" % _max_hp.to_string_suffix(2)
+		_damage_button.disabled = true
+		_damage_button.text = "VICTORY!"
+		return
+
+	var progress_pct: float = 0.0
+	if _max_hp.mantissa > 0.0:
+		progress_pct = (1.0 - (_current_hp.mantissa / _max_hp.mantissa)) * pow(10.0, float(_current_hp.exponent - _max_hp.exponent))
+		progress_pct = clampf(progress_pct * 100.0, 0.0, 100.0)
+
+	_hp_value.text = "%s / %s (%.1f%%)" % [_current_hp.to_string_suffix(2), _max_hp.to_string_suffix(2), progress_pct]
+
+	var unit_balance: BigNumber = game_state.get_currency_amount_by_id(&"unit")
+	_damage_button.text = "Send Army (%s units)" % unit_balance.to_string_suffix(2)
+	_damage_button.disabled = unit_balance.mantissa <= 0.0
+
+
+func _save_state() -> void:
+	if game_state == null:
+		return
+	var payload: Dictionary = {HP_KEY: _current_hp.serialize()}
+	game_state.set_external_save_data(SAVE_KEY, payload)
+
+
+func _load_state() -> void:
+	if game_state == null:
+		return
+	var saved: Dictionary = game_state.get_external_save_data(SAVE_KEY)
+	if saved.has(HP_KEY):
+		var raw_hp: Variant = saved.get(HP_KEY)
+		if raw_hp is Dictionary:
+			_current_hp = BigNumber.deserialize(raw_hp)
+			if _current_hp.mantissa <= 0.0:
+				_current_hp = BigNumber.new(0.0, 0)
+				_is_destroyed = true
+				_victory_label.visible = true

docs/gyms/tiny_sword/buildings/devil_idol/devil_idol.gd.uid

@@ -0,0 +1 @@
+uid://blfof77kjp7x0

docs/gyms/tiny_sword/buildings/devil_idol/devil_idol.tscn

@@ -0,0 +1,57 @@
+[gd_scene format=3 uid="uid://d1cvlnd5vwjol"]
+
+[ext_resource type="Script" uid="uid://blfof77kjp7x0" path="res://docs/gyms/tiny_sword/buildings/devil_idol/devil_idol.gd" id="1_script"]
+[ext_resource type="Texture2D" uid="uid://rpedoq4102to" path="res://docs/gyms/tiny_sword/buildings/devil_idol/Castle.png" id="2_g7pcm"]
+
+[sub_resource type="RectangleShape2D" id="RectangleShape2D_idol"]
+size = Vector2(312, 198)
+
+[node name="DevilIdol" type="Node2D" unique_id=797117647]
+script = ExtResource("1_script")
+
+[node name="Sprite2D" type="Sprite2D" parent="." unique_id=661703335]
+texture = ExtResource("2_g7pcm")
+
+[node name="Area2D" type="Area2D" parent="." unique_id=1812195052]
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Area2D" unique_id=1492517397]
+position = Vector2(1, 22)
+shape = SubResource("RectangleShape2D_idol")
+
+[node name="IdolPanel" type="PanelContainer" parent="." unique_id=906038530]
+offset_left = -200.0
+offset_top = -120.0
+offset_right = 200.0
+offset_bottom = -10.0
+
+[node name="MarginContainer" type="MarginContainer" parent="IdolPanel" unique_id=1952977282]
+layout_mode = 2
+theme_override_constants/margin_left = 10
+theme_override_constants/margin_top = 10
+theme_override_constants/margin_right = 10
+theme_override_constants/margin_bottom = 10
+
+[node name="VBoxContainer" type="VBoxContainer" parent="IdolPanel/MarginContainer" unique_id=1214756176]
+layout_mode = 2
+theme_override_constants/separation = 8
+
+[node name="TitleLabel" type="Label" parent="IdolPanel/MarginContainer/VBoxContainer" unique_id=1268978638]
+layout_mode = 2
+text = "Devil Idol"
+
+[node name="HPValue" type="Label" parent="IdolPanel/MarginContainer/VBoxContainer" unique_id=529436307]
+layout_mode = 2
+text = "??? / ???"
+
+[node name="DamageButton" type="Button" parent="IdolPanel/MarginContainer/VBoxContainer" unique_id=1565608485]
+layout_mode = 2
+disabled = true
+text = "Send Army"
+
+[node name="VictoryLabel" type="Label" parent="IdolPanel/MarginContainer/VBoxContainer" unique_id=169309796]
+layout_mode = 2
+text = "THE DEVIL IDOL HAS BEEN DESTROYED!"
+horizontal_alignment = 1
+
+[connection signal="mouse_entered" from="Area2D" to="." method="_on_area_2d_mouse_entered"]
+[connection signal="mouse_exited" from="Area2D" to="." method="_on_area_2d_mouse_exited"]

docs/gyms/tiny_sword/buildings/farm/farm.gd

@@ -0,0 +1,25 @@
+extends Node2D
+
+const UNLOCK_GOAL_ID: StringName = &"gold_total_1300"
+
+@onready var _sprite: Sprite2D = $Sprite2D
+@onready var _area: Area2D = $Area2D
+@onready var _game_state: LevelGameState = find_parent("LevelGameState")
+
+
+func _ready() -> void:
+	_sprite.visible = false
+	_area.monitoring = false
+	_game_state.goal_completed.connect(_on_goal_completed)
+	if _game_state.is_goal_completed(UNLOCK_GOAL_ID):
+		_unlock()
+
+
+func _on_goal_completed(goal_id: StringName) -> void:
+	if goal_id == UNLOCK_GOAL_ID:
+		_unlock()
+
+
+func _unlock() -> void:
+	_sprite.visible = true
+	_area.monitoring = true

docs/gyms/tiny_sword/buildings/farm/farm.gd.uid

@@ -0,0 +1 @@
+uid://dnsblnjy82goo

docs/gyms/tiny_sword/buildings/farm/farm.tscn

@@ -1,6 +1,7 @@
 [gd_scene format=3 uid="uid://djedqovgngrx5"]
 
 [ext_resource type="PackedScene" uid="uid://jeoiinukrrsp" path="res://core/generator/currency_generator.tscn" id="1_rvsna"]
+[ext_resource type="Script" path="res://docs/gyms/tiny_sword/buildings/farm/farm.gd" id="1_script"]
 [ext_resource type="Resource" uid="uid://bxg2au0ijp242" path="res://docs/gyms/tiny_sword/currencies/food.tres" id="2_djlc5"]
 [ext_resource type="Resource" uid="uid://d08h51y0pnsnf" path="res://docs/gyms/tiny_sword/buildings/farm/farm_generator.tres" id="3_82rmq"]
 [ext_resource type="Texture2D" uid="uid://dfdh8r03sj7qv" path="res://docs/gyms/tiny_sword/buildings/farm/House1.png" id="4_djlc5"]
@@ -10,6 +11,7 @@
 size = Vector2(106, 157)
 
 [node name="Farm" type="Node2D" unique_id=283335851]
+script = ExtResource("1_script")
 
 [node name="CurrencyGenerator" parent="." unique_id=967969064 node_paths=PackedStringArray("info_generator_container") instance=ExtResource("1_rvsna")]
 currency = ExtResource("2_djlc5")

docs/gyms/tiny_sword/buildings/forestry/forestry.gd

@@ -1,13 +1,35 @@
 extends Node2D
 
-@onready var _generator_container: GeneratorPanel = $GeneratorContainer
+const UNLOCK_GOAL_ID: StringName = &"gold_total_13k"
+
+@onready var _generator_container: GeneratorPanel = $GeneratorContainer
+@onready var _sprite: Sprite2D = $Sprite2D
+@onready var _area: Area2D = $Area2D
+@onready var _game_state: LevelGameState = find_parent("LevelGameState")
+
 
-# Called when the node enters the scene tree for the first time.
 func _ready() -> void:
 	_generator_container.visible = false
+	_sprite.visible = false
+	_area.monitoring = false
+	_game_state.goal_completed.connect(_on_goal_completed)
+	if _game_state.is_goal_completed(UNLOCK_GOAL_ID):
+		_unlock()
+
 
 func _on_area_2d_mouse_entered() -> void:
 	_generator_container.visible = true
 
+
 func _on_area_2d_mouse_exited() -> void:
 	_generator_container.visible = false
+
+
+func _on_goal_completed(goal_id: StringName) -> void:
+	if goal_id == UNLOCK_GOAL_ID:
+		_unlock()
+
+
+func _unlock() -> void:
+	_sprite.visible = true
+	_area.monitoring = true

docs/gyms/tiny_sword/buildings/monastery/monastery.gd

@@ -1,14 +1,37 @@
 extends Node2D
 
-@onready var _research_panel: ResearchPanel = $ResearchPanel
+const RESEARCH_GOAL_ID: StringName = &"gold_350k_wood_20k"
+
+@onready var _research_panel: ResearchPanel = $ResearchPanel
+@onready var _sprite: Sprite2D = $Sprite2D
+@onready var _area: Area2D = $Area2D
+@onready var game_state: LevelGameState = find_parent("LevelGameState")
+
 
-# Called when the node enters the scene tree for the first time.
 func _ready() -> void:
 	_research_panel.visible = false
+	_sprite.visible = false
+	_area.monitoring = false
+	if game_state:
+		game_state.goal_completed.connect(_on_goal_completed)
+		if game_state.is_goal_completed(RESEARCH_GOAL_ID):
+			_unlock()
+
 
 func _on_area_2d_mouse_entered() -> void:
-	_research_panel.visible = true
+	if game_state and game_state.is_goal_completed(RESEARCH_GOAL_ID):
+		_research_panel.visible = true
 
 
 func _on_area_2d_mouse_exited() -> void:
 	_research_panel.visible = false
+
+
+func _on_goal_completed(goal_id: StringName) -> void:
+	if goal_id == RESEARCH_GOAL_ID:
+		_unlock()
+
+
+func _unlock() -> void:
+	_sprite.visible = true
+	_area.monitoring = true