Code:

//Configure app for landscape game mode.

cfg.Game, cfg.Landscape

​

//Handle game loading.
function OnLoad()
{
    //Enable physics & enclose scene with walls.
    //Note: zero gravity because it is slippery!
    gfx.AddPhysics( 0 )
    gfx.Enclose( -1, "left,top,right,bottom", 0.1,0.1,0.1, 0.05 )
    
    //Create background.
    floor = gfx.CreateBackground( "Img/Floor2.png" )
    
    //Create sprites.
    blob = gfx.CreateSprite( "Img/blob_1000x1500x5.png", "blobs" )
    food = gfx.CreateSprite( "Img/Food.png", "foods" )
    gameover = gfx.CreateSprite( "Img/gameoverend.png" )
    

    //Create sounds.
    //(Sounds from www.zapsplat.com)
    soundEat= gfx.CreateSound( "Snd/pop.mp3" )
    soundDiminish = gfx.CreateSound( "Snd/diminish.mp3" )
    soundMusic= gfx.CreateSound( "Snd/music1.mp3" )
}

//Called when game has loaded.
function OnReady()
{
    //Set background.
    gfx.AddBackground( floor )
    
    //Add game objects to screen.
    AddBlob()
    AddButtons()    

​

    //Add more food every so often
    setInterval( AddFood, 3000 + 3000*Math.random() )
    
    //Start animating
    gfx.Animate( OnAnimate )
    
    //Play Music
    soundMusic.Play( true, 500 ) 
}

​

//Update game objects.
function OnAnimate( time, timeDiff ) 
{    
    //Decrease blob size over time
    blob.width = blob.width - 0.0001 ;
    blob.height = blob.height - 0.0001 ;
 
    //When blob size reaches 0, game over.
    if( blob.width < 0) 
    { 
        //Play game over  sound.
        soundDiminish.Play() ;
        
        //Show game over screen
        gfx.AddSprite( gameover, 0.22, 0.4, 0.5, 0.25 ) ;
        gfx.Pause() ;
    }
}

//Add a new blob to screen.
function AddBlob()
{
    //Add blob image to center of screen & show frame 4.
    gfx.AddSprite( blob, 0.45, 0.5, 0.1 )
    blob.Goto( 4 )
    
    //Set physics properties for blob.
    //group, type, density, bounce, friction etc.
    blob.SetPhysics( -2, "dynamic", 0.9, 0.9, 0.3, 0.3, 0.3 ) 
    blob.SetShape( "rect", 0.7, 0.7 )    
   
}

​

//Add food image to screen, with physics and animation.
function AddFood()
{
    //Add a new food image to screen at random x location.
    food = gfx.CreateSprite( "Img/Food.png", "foods" )
    var size = 0.1+0.1*Math.random()
    gfx.AddSprite( food, Math.random()*0.7, -0.3, size )
    
    //Set physics properties for food.
    food.SetPhysics( -1, "dynamic", 0.9, 0.9, 0.9 )
    food.SetShape( "round", 0.5 )    
    food.SetVelocity( -0.01+0.02*Math.random(), 0.02/size, -0.05+0.1*Math.random()/size )
}

​

//Add control buttons for mobile.
function AddButtons()
{
    //Left stick
    var stickSize = 0.08
    leftStick = gfx.CreateCircle( stickSize, 0x04defb )
    gfx.AddGraphic( leftStick, 0.005, 1-leftStick.height*2 )
    leftStick.alpha = 0.3
    
    //Right stick
    rightStick = gfx.CreateCircle( stickSize, 0x04defb )
    gfx.AddGraphic( rightStick, leftStick.width*1.5, 1-rightStick.height*2 )
    rightStick.alpha = 0.3
    
    //Forward stick
    fwdStick = gfx.CreateCircle( stickSize, 0x3bf906 )
    gfx.AddGraphic( fwdStick, leftStick.width*0.75, 1-fwdStick.height*3+0.02 )
    fwdStick.alpha = 0.3
    
    //Reverse stick
    revStick = gfx.CreateCircle( stickSize, 0x3bf906 )
    gfx.AddGraphic( revStick, leftStick.width*0.75, 1-revStick.height-0.02 )
    revStick.alpha = 0.3
}

​

//Handle key presses and screen touches.
function OnControl( touchState, touchX, touchY, keyState, key )
{
    //Check for arrow keys or joystick touches
    if( key=="ArrowLeft" || leftStick.Contains(touchX,touchY) ) 
    { 
        blob.AddVelocity( 0, 0, -0.01 )
        blob.Goto(2)
    }        
    else if( key=="ArrowRight" || rightStick.Contains(touchX,touchY) ) 
    { 
        blob.AddVelocity( 0, 0, 0.01 )
        blob.Goto(4) 
    }
    else if( key=="ArrowUp" || fwdStick.Contains(touchX,touchY) ) 
        {
        blob.AddVelocity( 0, -0.01, 0, true )    
        blob.Goto(1)
        }
    else if( key=="ArrowDown" || revStick.Contains(touchX,touchY) ) 
    {    
        blob.AddVelocity( 0, 0.01, 0, true )
        blob.Goto(5)
    }
    
    //Else straighten up blob
    else blob.Goto( 3 )
}

​

//Handle sprite collisions.
function OnCollide( a, b )
{
    //console.log( "a:" + a.group + " b:"+b.group )
    
    //Handle character and object collision
    if( a.group=="blobs" && b.group=="foods" )
    {
        //Increase character size
        blob.width = blob.width + 0.04 ;
        blob.height = blob.height + 0.04 ;
        
        //Play eating  sound.
        soundEat.Play()
        
        //Vibrate device
        gfx.Vibrate( "0,50" );
        
        //Remove food sprite.
        gfx.RemoveSprite( b )
    }
}