added todo list

Author: thamaraiselvam

TODO

@@ -0,0 +1,13 @@
+
+Todo:
+  ☐ Design Home page
+  ☐ Vibrate when wrong item selected
+  ☐ Store recent scores in local storage
+  ☐ Plan/remove Rank
+  ☐ Icon rethink
+  ☐ Code refactor
+  ☐ Add constant file
+  ☐ Write test cases
+
+
+

lib/screens/GameScreen.dart

@@ -15,7 +15,7 @@ class _GameScreenState extends State<GameScreen> {
   List<BlockSchema> blocks;
   int currentTotal;
   Timer gameTimerObject;
-  int secCounter = 2;
+  int secCounter = 30;
   bool isTimeUp = false;
   Map<String, int> gameHistory = {"total": 0, "success": 0, "fail": 0};
   BlockDataStream blockDataStream = BlockDataStream();