resize taquin to 2/3rd of the window

src/Main.gd

@@ -4,6 +4,7 @@ onready var container = $GridContainer
 onready var taquin = $GridContainer/Taquin
 
 func _ready():
+	taquin.rect_min_size = get_viewport().get_visible_rect().size * (2.0 / 3.0)
 	layout_reflow()
 	load_game()
 	print("Starting state: ", taquin.current_state_name())
@@ -27,6 +28,7 @@ func layout_reflow():
 	else:
 		# landscape
 		container.columns = 2
+	update()
 
 # https://docs.godotengine.org/en/3.2/tutorials/io/saving_games.html
 func save_game():