add game menu

core/game_menu/game_menu_tab.gd

@@ -0,0 +1,50 @@
+@tool
+extends Control
+
+class_name GameMenuTab
+
+signal on_tab_selected(index: int)
+
+@export var bob_height: float = 100
+@export var duration: float = 0.5
+@export var index: int = 0
+@export var image: Texture:
+	set(value):
+		image = value
+		if is_inside_tree() and has_node("%Texture"):
+			$%Texture.texture = image
+
+@onready var texture: TextureRect = $%Texture
+
+var is_selected: bool = false
+var hover_tween: Tween
+
+func _ready():
+	if image != null and has_node("%Texture"):
+		$%Texture.texture = image
+
+func _on_gui_input(event: InputEvent) -> void:
+	if event is InputEventMouseButton and event.button_index == MOUSE_BUTTON_LEFT and event.pressed:
+		on_tab_selected.emit(index)
+
+func select():
+	is_selected = true
+	_move_up()
+
+func deselect():
+	is_selected = false
+	_move_down()
+
+func select_without_animation():
+	is_selected = true
+	texture.position.y = -bob_height
+
+func _move_up():
+	if hover_tween: hover_tween.kill()
+	hover_tween = create_tween()
+	hover_tween.tween_property(texture, "position:y", -bob_height, duration).set_trans(Tween.TRANS_SINE)
+
+func _move_down():
+	if hover_tween: hover_tween.kill()
+	var exit_tween = create_tween()
+	exit_tween.tween_property(texture, "position:y", 0, duration).set_trans(Tween.TRANS_QUAD)