HTML5 platformer prototype inspired by iOS hit “Yeah Bunny” thanks to Phaser and ARCADE physics

Read all posts about "" game
During these days I am playing, among other games, Yeah Bunny by Adrian Zarzycki. It’s a cute game which reminds me old Taito platformers, just reimagined for mobile control. The bunny runs automatically, changes direction each time it hits an obstacle, can jump, double jump, perform wall jump and slide down the walls. Uh, and since levels in Yeah Bunny are larger than the screen, the camera follows automatically the bunny – yeah, you control a bunny. A lot of controls, which may seem really hard to replicate. Well, thanks to Phaser and ARCADE phyiscs, starting from the script I showed you in the post The basics behind “wall jump” in platform games. HTML5 prototype made with Phaser and ARCADE physics, we can have a complete prototype made in a few lines. Have a look:
Just click or tap to make the character jump, double jump, climb the walls and explore the level. If you have a mobile device, you can play the prototype directly from this link. And what about the source code? Did I really make this prototype with just a few lines? Have a look by yourself, the code is commented line by line:
var game;
var gameOptions = {

    // width of the game, in pixels
    gameWidth: 640,

    // height of the game, in pixels
    gameHeight: 480,

    // background color
    bgColor: 0x444444,

    // player gravity
    playerGravity: 900,

    // player friction when on wall
    playerGrip: 100,

    // player horizontal speed
    playerSpeed: 200,

    // player jump force
    playerJump: 400,

    // player double jump force
    playerDoubleJump: 300
}
window.onload = function() {
    game = new Phaser.Game(gameOptions.gameWidth, gameOptions.gameHeight);
    game.state.add("PreloadGame", preloadGame);
    game.state.add("PlayGame", playGame);
    game.state.start("PreloadGame");
}
var preloadGame = function(game){}
preloadGame.prototype = {
    preload: function(){
        game.stage.backgroundColor = gameOptions.bgColor;
        game.scale.scaleMode = Phaser.ScaleManager.SHOW_ALL;
        game.scale.pageAlignHorizontally = true;
        game.scale.pageAlignVertically = true;
        game.stage.disableVisibilityChange = true;

        // loading level tilemap
        game.load.tilemap("level", 'level.json', null, Phaser.Tilemap.TILED_JSON);
        game.load.image("tile", "tile.png");
        game.load.image("hero", "hero.png");
    },
    create: function(){
        game.state.start("PlayGame");
    }
}
var playGame = function(game){}
playGame.prototype = {
    create: function(){

        // starting ARCADE physics
        game.physics.startSystem(Phaser.Physics.ARCADE);

        // creatin of "level" tilemap
        this.map = game.add.tilemap("level");

        // adding tiles (actually one tile) to tilemap
        this.map.addTilesetImage("tileset01", "tile");

        // tile 1 (the black tile) has the collision enabled
        this.map.setCollision(1);

        // which layer should we render? That's right, "layer01"
        this.layer = this.map.createLayer("layer01");

        // adding the hero sprite
        this.hero = game.add.sprite(300, 376, "hero");

        // setting hero anchor point
        this.hero.anchor.set(0.5);

        // enabling ARCADE physics for the  hero
        game.physics.enable(this.hero, Phaser.Physics.ARCADE);

        // setting hero gravity
        this.hero.body.gravity.y = gameOptions.playerGravity;

        // setting hero horizontal speed
        this.hero.body.velocity.x = gameOptions.playerSpeed;

        // the hero can jump
        this.canJump = true;

        // the hern cannot double jump
        this.canDoubleJump = false;

        // the hero is not on the wall
        this.onWall = false;

        // waiting for player input
        game.input.onDown.add(this.handleJump, this);

        // set workd bounds to allow camera to follow the player
        game.world.setBounds(0, 0, 1920, 1440);

        // making the camera follow the player
        game.camera.follow(this.hero, Phaser.Camera.FOLLOW_PLATFORMER, 0.1, 0.1);
    },
    handleJump: function(){
        // the hero can jump when:
        // canJump is true AND the hero is on the ground (blocked.down)
        // OR
        // the hero is on the wall
        if((this.canJump && this.hero.body.blocked.down) || this.onWall){

            // applying jump force
            this.hero.body.velocity.y = -gameOptions.playerJump;

            // is the hero on a wall?
            if(this.onWall){

                // change the horizontal velocity too. This way the hero will jump off the wall
                this.setPlayerXVelocity(true);
            }

            // hero can't jump anymore
            this.canJump = false;

            // hero is not on the wall anymore
            this.onWall = false;

            // the hero can now double jump
            this.canDoubleJump = true;
        }
        else{

            // cam the hero make the doubple jump?
            if(this.canDoubleJump){

                // the hero can't double jump anymore
                this.canDoubleJump = false;

                // applying double jump force
                this.hero.body.velocity.y = -gameOptions.playerDoubleJump;
            }
        }
    },
    update: function(){

        // set some default gravity values. Look at the function for more information
        this.setDefaultValues();

        // handling collision between the hero and the tiles
        game.physics.arcade.collide(this.hero, this.layer, function(hero, layer){

            // some temporary variables to determine if the player is blocked only once
            var blockedDown = this.hero.body.blocked.down;
            var blockedLeft = this.hero.body.blocked.left
            var blockedRight = this.hero.body.blocked.right;

            // if the hero hits something, no double jump is allowed
            this.canDoubleJump = false;

            // hero on the ground
            if(blockedDown){

                // hero can jump
                this.canJump = true;
            }

            // hero on the ground and touching a wall on the right
            if(blockedRight){

                // horizontal flipping hero sprite
                this.hero.scale.x = -1;
            }

            // hero on the ground and touching a wall on the right
            if(blockedLeft){

                // default orientation of hero sprite
                this.hero.scale.x = 1;
            }

            // hero NOT on the ground and touching a wall on the right
            if((blockedRight || blockedLeft) && !blockedDown){

                // hero on a wall
                this.onWall = true;

                // remove gravity
                this.hero.body.gravity.y = 0;

                // setting new y velocity
                this.hero.body.velocity.y = gameOptions.playerGrip;
            }

            // adjusting hero speed according to the direction it's moving
            this.setPlayerXVelocity(!this.onWall || blockedDown);
        }, null, this);
    },

    // default values to be set at the beginning of each update cycle,
    // which may be changed according to what happens into "collide" callback function
    // (if called)
    setDefaultValues: function(){
        this.hero.body.gravity.y = gameOptions.playerGravity;
        this.onWall = false;
        this.setPlayerXVelocity(true);
    },

    // sets player velocity according to the direction it's facing, unless "defaultDirection"
    // is false, in this case multiplies the velocity by -1
    setPlayerXVelocity(defaultDirection){
        this.hero.body.velocity.x = gameOptions.playerSpeed * this.hero.scale.x * (defaultDirection ? 1 : -1);
    }
}
This is what you can make in a short time thanks to Phaser and ARCADE physics, next time I’ll show you how to collect objects and avoid enemies, 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

214 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
// 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