Improved graphics. Added game over scene

Global.gd

@@ -0,0 +1,27 @@
+extends Node
+
+var score : int = 0 :
+	set(x):
+		score = x
+		EventBus.update_score.emit(score)
+		if score > highscore:
+			highscore = score
+
+var highscore : int = 0 :
+	set(x):
+		highscore = x
+		EventBus.update_highscore.emit(highscore)
+		_save()
+
+func _ready() -> void:
+	if FileAccess.file_exists("user://data.json"):
+		var data = JSON.parse_string(FileAccess.get_file_as_string("user://data.json"))
+		highscore = data.get("highscore", 0)
+
+func _save() -> void:
+	var data : Dictionary = {
+		"highscore": highscore
+	}
+	var f = FileAccess.open("user://data.json", FileAccess.WRITE)
+	f.store_string(JSON.stringify(data))
+	f.close()