​
Code Explained - The Landing Page :

​import 'package:flutter/material.dart';
import './quiz_page.dart';
import './list.dart';
import './homepage.dart';
import './testslist.dart';
import './allmissedquestions.dart';
import '../Terms/terms1.dart';
import 'page.dart';

class LandingPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new Material(
      color: Colors.orangeAccent,
      child: new InkWell(

       // onTap: () => Navigator.of(context).push(new MaterialPageRoute(builder: (BuildContext context) => new QuizPage())),
        //onTap: () => Navigator.of(context).push(new MaterialPageRoute(builder: (BuildContext context) => new MyHomePage())),
       // onTap: () => Navigator.of(context).pushAndRemoveUntil(new MaterialPageRoute(builder: (BuildContext context) => new TestsList()), (Route route) => route == null),
       onTap: () => Navigator.of(context).pushAndRemoveUntil(new MaterialPageRoute(builder: (BuildContext context) => new Page()), (Route route) => route == null),
        child: new Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            new Text("AP GO POW", style: new TextStyle(color: Colors.white, fontSize: 50.0, fontWeight: FontWeight.bold),),
            new Text("Tap to start!", style: new TextStyle(color: Colors.white, fontSize: 20.0, fontWeight: FontWeight.bold),),
            new Text(""),
            Image.network(
              'https://www.askthecat.org/uploads/6/2/4/4/62443641/65-ask-the-cat_13.png',

            ),

          ],
        ),

      ),
    );
  }
}

---