juskek

...
class FlyTerminator extends Game with TapDetector {
  ...
  void spawnFly() {
    ...
    flies!.add(Fly(this, x, y));
  }
  
  void update(double t) {
    ...

juskek

...

class FlyTerminator extends Game {
  ...
  List<Fly>? flies;
  Random? rnd;

  FlyTerminator() {
    initialize();
  }

juskek

class Fly {
  final FlyTerminator game;
  Rect? flyRect;
  Paint flyPaint = Paint();

  Fly(this.game, double x, double y) {
    flyRect = Rect.fromLTWH(x, y, game.tileSize!, game.tileSize!);
    flyPaint.color = Color(0xff6ab04c);
  }

juskek

void main() {
  print('Hello World!');

  List<int> testList = List.generate(5, (index) => index);
  print(testList);
}

// OUTPUT:
// Hello World!
// [0,1,2,3,4]

juskek

import 'package:flame/gestures.dart'; // for TapDetector mixin
import 'package:flutter/gestures.dart'; // for TapDownDetails class

class BoxGame extends Game with TapDetector {
  
  bool hasWon = false;

  @override
  void onTapDown(TapDownDetails tapDownDetails) {
    // handle taps here

juskek

void render(Canvas canvas) {
  /// BACKGROUND (BOTTOMMOST LAYER)
  Rect bgRect = Rect.fromLTWH(0, 0, screenSize!.width,screenSize!.height);
  Paint bgPaint = Paint();
  bgPaint.color = Color(0xffbbcc00);
  canvas.drawRect(bgRect, bgPaint);
  /// TARGET BOX (TOPMOST LAYER)
  print(screenSize); // ! target box does not change with screen size
  double screenCenterX = screenSize!.width / 2;
  double screenCenterY = screenSize!.height / 2;

juskek

class CustomGame extends Game {
Size? screenSize;
bool hasPressed;
// this will be CustomGame's resize function
@override
void resize (Size size) {
screenSize = size; // assign Game widget size to screenSize
super.resize(size); // call Game's resize function again
}
... // update and render functions

juskek

void main() {
  CustomGame game = CustomGame(); // create instance of class
  runApp(game.widget); // run game
}

juskek

class CustomGame extends Game {   
  @override
  void render(Canvas canvas) {     
  // TODO: implement render   
  }    
  @override
  void update(double t) {     
  // TODO: implement update   
  } 
}

juskek

// in pubspec.yaml 
flame: ^0.29.4
// in main.dart
import 'package:flutter/material.dart';
import 'package:flame/game.dart'; // for creating Game class
import 'package:flame/gestures.dart'; // for TapDetector mixin
import 'package:flutter/gestures.dart'; // for TapDownDetails class
import 'dart:ui'; // for Canvas and Size
// in console
flutter run --no-sound-null-safety