flutter_tetris/lib/pages/home_page.dart

import 'package:flutter/material.dart';
import 'package:tetris/panel/page_portrait.dart';

class HomePage extends StatelessWidget {
  const HomePage({Key key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    //only Android/iOS support land mode
    bool land = MediaQuery.of(context).orientation == Orientation.landscape;
    return land ? PageLand() : PagePortrait();
  }
}