Code:

//Configure app for landscape game mode.
cfg.Game, cfg.Landscape

​

//Global variables

var gameOver = false

 

//Handle game loading.

function OnLoad()

{

    //Add physics and enclose scene with roof and floor.

    gfx.AddPhysics()

    gfx.Enclose( -1, "top,bottom" )

    

    //Create background (and stretch it to full screen).

    sky = gfx.CreateBackground( "Img/flappy_back.jpg", "stretch" )

​

    //Create graphical objects.

    dino = gfx.CreateSprite( "Img/dino_fly_783x136x3x1", "dinos" )

    crash = gfx.CreateSpriteSheet( "Img/dino_crash_920x138x4" )

    croc = gfx.CreateSprite( "Img/crocs_149x686x1x2", "enemies" )

    

    //Create sounds.

    jungle = gfx.CreateSound( "Snd/jungle.mp3" )

    end = gfx.CreateSound( "Snd/game_over.mp3" )

    crunch = gfx.CreateSound( "Snd/crunch.mp3" )

}

 

//Called when game has loaded.

function OnReady()

{

    //Set background.

    gfx.AddBackground( sky )

​

    //Add dino image (with physics)

    //Physics params: group, type, density, bounce, friction, linearDamp, angularDamp

    gfx.AddSprite( dino, 0.1, 0.3, 0.15 )

    dino.SetPhysics( 1, "dynamic" )

​

    //Set dino physics shape to be a rectangle slightly smaller than

    //the source image boundary so that collisions look more realistic.

    dino.SetShape( "rect", 0.7, 0.7 )

​

    //Add enemy sprites.

    gfx.AddSprite( croc, 0.8, 0.55, 0.12 )

    croc.SetPhysics( 2, "fixed", 1 )

​

    //Start animations

    dino.Play( 0, 0.25 )

    croc.Play( 0, 0.01 )

    

    //Play looping background sound.

    jungle.Play( /*true*/ )

​

    //Start the game.

    gfx.Play()

}

 

//Update game objects.

//(called for every frame)

function OnAnimate( time, timeDiff ) 

{

    //alert( "step" )

    //Do nothing if game is over.

    if( gameOver ) return

​

    //Make background slide to the left a small amount.

    sky.Scroll( -0.002, 0 )

​

    //Slide croc to left. 

    croc.x -= 0.004

​

    //If croc has gone off left side of screen.

    if( croc.x < -croc.width ) 

    { 

        //Move the croc back to the right hand side.

        croc.x = 1

​

        //Scale croc with a random value.

        var height = 0.4 + Math.random()*0.4

        croc.SetSize( null, height )

        croc.y = 1 - croc.height

    }

 

    //We need to update the physics state when we manually 

    //move objects that use physics.

    croc.UpdatePhysics()

​

    //Check for dino collisions with spiky grass.

    if( dino.y > 0.8 && !gameOver ) Crash()

}

 

//Crash our character and end the game.

function Crash()

{

    console.log("crash!")

    //Switch sprite sheets and change play speed.

    dino.SetSpriteSheet( crash )

    dino.Play( 0, 0.1 )

​

    //Play crunch sound and prevent scroll.

    crunch.Play()

​

    //Play 'game over' sound after half a second.

    end.Play( false, 500 )

​

    //Set gameover state.

    gameOver = true

}

 

//Handle screen touches and key presses.

function OnControl( touchState, touchX, touchY, keyState, key )

{

    //Increase dino's upward velocity when screen touched.

    if( touchState=="Up" && !gameOver ) dino.AddVelocity( 0, -0.3 )

}

 

//Handle sprite collisions.

function OnCollide( a, b )

{

    console.log( "a:" + a.group + " b:"+b.group )

    

    if( a.group=="dinos" && b.group=="enemies" ) 

    {

        //If dino hits croc, then play the crash

        //animation and disable physics for croc, so

        //that way is clear for dino to fall to floor.

        Crash()

        croc.EnablePhysics( false )

    }

}