1+2=3 HTML5 game made in 100 lines of code – brackets included – using Phaser

Read all posts about "" game

There are fun and addictive games which seem really easy to code, and in most cases they are.

This is the case of 1+2=3 game for iOS. This is a very simple math game which all the questions and answers are combined by 1, 2, 3, plus and minus. You just have to tell the result of some simple sums like 1+1, 2+1, 3-2 and so on. You will always be using only 1, 2 and 3.

I tried to make the game in 100 lines of code, brackets included and with a correct indentation, and that’s what I got:

window.onload = function() {	
	var game = new Phaser.Game(500, 500, Phaser.CANVAS, "", {
		preload: onPreload,
		create: onCreate
	});
	var sumsArray = []; 
	var questionText;
	var randomSum;
	var timeTween;
	var numberTimer;
	var buttonMask;
	var score=0;
	var scoreText;
     var isGameOver = false;
     var topScore;
     var numbersArray = [-3,-2,-1,1,2,3];
	function buildThrees(initialNummber,currentIndex,limit,currentString){
		for(var i=0;i0 && sum<4 && currentIndex==limit){
				sumsArray[limit][sum-1].push(outputString);
			}
			if(currentIndex0) {
     				timeTween.stop();
     			}
     			gameOver(button.frame+1);
     		}
          }
	}
	function nextNumber(){
		scoreText.text = "Score: "+score.toString()+"\nBest Score: "+topScore.toString();
		if(buttonMask){
			buttonMask.destroy();
               game.tweens.removeAll();
		}  
		buttonMask = game.add.graphics(50, 250);
		buttonMask.beginFill(0xffffff);
		buttonMask.drawRect(0, 0, 400, 200);
		buttonMask.endFill();
		numberTimer.mask = buttonMask;
		if(score>0){
			timeTween=game.add.tween(buttonMask);
			timeTween.to({
				x: -350
			}, 3000, "Linear",true);
			timeTween.onComplete.addOnce(function(){
	               gameOver("?");
	          }, this);
          }
		randomSum = game.rnd.between(0,2);  
		questionText.text = sumsArray[Math.min(Math.round((score-100)/400)+1,4)][randomSum][game.rnd.between(0,sumsArray[Math.min(Math.round((score-100)/400)+1,4)][randomSum].length-1)];
	}	
}

Using Phaser was really easy to create the game, and the only difficult thing – considering the 100 lines limit – was to find an algorithm to generate the random questions. I tried in various ways and eventually ended with a dirty trick.

Here is the game:

Click the button with 1, 2 or 3 according to the expression shown. When it’s game over, reload the game. What’s your best score?

A detailed tutorial about the making of this game will follow in a few days, meanwhile download the source code.

Get the most popular Phaser 3 book

Through 202 pages, 32 source code examples and an Android Studio project you will learn how to build cross platform HTML5 games and create a complete game along the way.

Get the book

215 GAME PROTOTYPES EXPLAINED WITH SOURCE CODE
// 1+2=3
// 100 rounds
// 10000000
// 2 Cars
// 2048
// A Blocky Christmas
// A Jumping Block
// A Life of Logic
// Angry Birds
// Angry Birds Space
// Artillery
// Astro-PANIC!
// Avoider
// Back to Square One
// Ball Game
// Ball vs Ball
// Ball: Revamped
// Balloon Invasion
// BallPusher
// Ballz
// Bar Balance
// Bejeweled
// Biggification
// Block it
// Blockage
// Bloons
// Boids
// Bombuzal
// Boom Dots
// Bouncing Ball
// Bouncing Ball 2
// Bouncy Light
// BoxHead
// Breakout
// Bricks
// Bubble Chaos
// Bubbles 2
// Card Game
// Castle Ramble
// Chronotron
// Circle Chain
// Circle Path
// Circle Race
// Circular endless runner
// Cirplosion
// CLOCKS - The Game
// Color Hit
// Color Jump
// ColorFill
// Columns
// Concentration
// Crossy Road
// Crush the Castle
// Cube Jump
// CubesOut
// Dash N Blast
// Dashy Panda
// Deflection
// Diamond Digger Saga
// Don't touch the spikes
// Dots
// Down The Mountain
// Drag and Match
// Draw Game
// Drop Wizard
// DROP'd
// Dudeski
// Dungeon Raid
// Educational Game
// Elasticity
// Endless Runner
// Erase Box
// Eskiv
// Farm Heroes Saga
// Filler
// Flappy Bird
// Fling
// Flipping Legend
// Floaty Light
// Fuse Ballz
// GearTaker
// Gem Sweeper
// Globe
// Goat Rider
// Gold Miner
// Grindstone
// GuessNext
// Helicopter
// Hero Emblems
// Hero Slide
// Hexagonal Tiles
// HookPod
// Hop Hop Hop Underwater
// Horizontal Endless Runner
// Hundreds
// Hungry Hero
// Hurry it's Christmas
// InkTd
// Iromeku
// Jet Set Willy
// Jigsaw Game
// Knife Hit
// Knightfall
// Legends of Runeterra
// Lep's World
// Line Rider
// Lumines
// Magick
// MagOrMin
// Mass Attack
// Math Game
// Maze
// Meeblings
// Memdot
// Metro Siberia Underground
// Mike Dangers
// Mikey Hooks
// Nano War
// Nodes
// o:anquan
// One Button Game
// One Tap RPG
// Ononmin
// Pacco
// Perfect Square!
// Perfectionism
// Phyballs
// Pixel Purge
// PixelField
// Planet Revenge
// Plants Vs Zombies
// Platform
// Platform game
// Plus+Plus
// Pocket Snap
// Poker
// Pool
// Pop the Lock
// Pop to Save
// Poux
// Pudi
// Pumpkin Story
// Puppet Bird
// Pyramids of Ra
// qomp
// Quick Switch
// Racing
// Radical
// Rebuild Chile
// Renju
// Rise Above
// Risky Road
// Roguelike
// Roly Poly
// Run Around
// Rush Hour
// SameGame
// SamePhysics
// Save the Totem
// Security
// Serious Scramblers
// Shrink it
// Sling
// Slingy
// Snowflakes
// Sokoban
// Space Checkers
// Space is Key
// Spellfall
// Spinny Gun
// Splitter
// Spring Ninja
// Sproing
// Stabilize!
// Stack
// Stairs
// Stick Hero
// String Avoider
// Stringy
// Sudoku
// Super Mario Bros
// Surfingers
// Survival Horror
// Talesworth Adventure
// Tetris
// The Impossible Line
// The Moops - Combos of Joy
// The Next Arrow
// Threes
// Tic Tac Toe
// Timberman
// Tiny Wings
// Tipsy Tower
// Toony
// Totem Destroyer
// Tower Defense
// Trick Shot
// Tunnelball
// Turn
// Turnellio
// TwinSpin
// vvvvvv
// Warp Shift
// Way of an Idea
// Whack a Creep
// Wheel of Fortune
// Where's my Water
// Wish Upon a Star
// Word Game
// Wordle
// Worms
// Yanga
// Yeah Bunny
// Zhed
// zNumbers