The first attempt at a game where each player programs an AI to control a blob which goes around and eats all of the smaller blobs. After this I went on to complete the concept by building upon Blockly Games instead of starting from scratch

blobgame.js

var updater;
var Ybound = 800;
var Xbound = 900;
passiveStarve = 5;
moveStarve = 1;

var blobs = [];
var foods = [];

$(document).ready( function() {
    $('#bounding-box').css('height',Ybound).css('width',Xbound);
    blobs.push(new blob(P(100,130)));
    blobs[0].setSpeed(P(1.0,1.0));
    blobs.push(new blob(P(300,150)));
    blobs[1].setSpeed(P(-0.5,0));
    blobs.push(new blob(P(200,300)));
    blobs[2].setSpeed(P(-1.0,-1.0));
    blobs.push(new blob(P(50,300)));
    blobs[3].setSpeed(P(-1.0,1.0));
        
    updater = setInterval(update, 50);
});

function update(){
    for(i=0; i<blobs.length; i++){
        blobs[i].update();
    }
    for(i=0; i<foods.length; i++){
        foods[i].update();
    }
    resolveCollisions();
    
    for(i=0; i<blobs.length; i++){
        if(blobs[i].dead){
            blobs.splice(i,1);
        }
    }
    for(i=0; i<foods.length; i++){
        if(foods[i].eaten){
            foods.splice(i,1);
        }
    }
    if(blobs.length == 0){
        $('#bounding-box').after('<p>All is DEAD!</p>');
        clearInterval(updater);
    }
    while(foods.length < 5){
        foods.push(new food(P()));
    }
}

function resolveCollisions(){
    for(i=0; i<blobs.length; i++){
        for(j=i+1; j<blobs.length; j++){
            var disX = Math.pow(blobs[i].pos.x-blobs[j].pos.x,2);
            var disY = Math.pow(blobs[i].pos.y-blobs[j].pos.y,2);
            var dis = Math.pow(disX+disY,0.5);
            if(dis < blobs[i].radius()+blobs[j].radius()){
                $('#'+blobs[i].elemId).css('background-color','#000000');
                $('#'+blobs[j].elemId).css('background-color','#000000');
                if(blobs[i].size>blobs[j].size){
                    transferSize(blobs[i],blobs[j]);
                }
                else if(blobs[i].size<blobs[j].size){
                    transferSize(blobs[j],blobs[i]);
                }
                else if(Math.random()<0.5){
                    transferSize(blobs[j],blobs[i]);
                }
                else{
                    transferSize(blobs[i],blobs[j]);
                }
            }
        }
        for(j=0; j<foods.length; j++){
            var disX = Math.pow(blobs[i].pos.x-foods[j].pos.x,2);
            var disY = Math.pow(blobs[i].pos.y-foods[j].pos.y,2);
            var dis = Math.pow(disX+disY,0.5);
            if(dis < blobs[i].radius()+foods[j].radius()){
                $('#'+blobs[i].elemId).css('background-color','#ff00ff');
                $('#'+foods[j].elemId).css('background-color','#ff00ff');
                transferSize(blobs[i],foods[j]);
            }
        }
    }  
}

function transferSize(b1, b2){
    /*a1 = 3.14 * Math.pow(b1.size,2);
    a2 = 3.14 * Math.pow(b2.size,2);
    a1 += a2/5;
    a2 -= a2/5;
    b1.size = Math.pow(a1 / 3.14,0.5);
    b2.size = Math.pow(a2 / 3.14,0.5);*/
    b1.size += b2.size/5;
    b2.size -= b2.size/5;
}

function Pair(X, Y){
    this.x = X;
    this.y = Y;
    
    this.mag = function(){
        return Math.pow(Math.pow(this.x,2)+Math.pow(this.y,2),0.5);   
    }
}
function P(X,Y){
    // Make a random value as default if no args are passed.
    X = typeof X !== 'undefined' ? X : Math.random()*Xbound;
    Y = typeof Y !== 'undefined' ? Y : Math.random()*Ybound;
    
    return new Pair(X,Y);   
}

function blob(point){
    this.size = 5000;
    this.pos = point;
    this.dead = false;
    var speed = P(0,0);
    // Blob and four random digits
    this.elemId = "blob" + Math.floor(Math.random()*10000);
    
    this.radius = function(){
        return Math.pow(this.size/3.14,0.5);   
    }
        
    this.setSpeed = function(speedpair){
        speed = speedpair;
    }
    
    this.update = function(){
        if(!this.dead){
            this.pos.x = this.pos.x + (speed.x);
            this.pos.y = this.pos.y + (speed.y);
            this.size = this.size - passiveStarve - Math.pow(speed.mag(),2)*moveStarve;
            if(this.size < 2){
                this.dead = true;
            }
            
            if(this.pos.x < this.radius()){
                this.pos.x = this.radius();
                speed.x = 0;
            }
            else if(this.pos.x > Xbound - this.radius()){
                this.pos.x = Xbound - this.radius();
                speed.x = 0;
            }
            if(this.pos.y < this.radius()){
                this.pos.y = this.radius();
                speed.y = 0;
            }
            else if(this.pos.y > Ybound - this.radius()){
                this.pos.y = Ybound - this.radius();
                speed.y = 0;
            }
            this.draw();
        }
    }
    
    this.initDraw = function(){
        $('#bounding-box').append('<div class="blob" id='+this.elemId+'/>');
    }
    this.draw = function(){
        if(this.dead){
            $('#'+this.elemId).remove();
        }       
        else{
            $('#'+this.elemId).css('left',this.pos.x-this.radius());
            $('#'+this.elemId).css('top',this.pos.y-this.radius());
            $('#'+this.elemId).css('height',this.radius()*2);
            $('#'+this.elemId).css('width',this.radius()*2);
            $('#'+this.elemId).css('border-radius',this.radius());
        }
    }
    
    // When the blob is constructed, draw it.
    this.initDraw();
}

function food(point) {
    this.pos = point;
    this.size = 500;
    this.elemId = "food" + Math.floor(Math.random()*10000);
    this.eaten = false;
    
    this.radius = function(){
        return Math.pow(this.size/3.14,0.5);   
    }
    
    this.update = function(){
        if(this.size < 2){
            this.eaten = true;
        }
        this.draw(); 
    }
    this.initDraw = function(){
        $('#bounding-box').append('<div class="food" id='+this.elemId+'/>');        }
    this.draw = function(){
        if(this.eaten){
            $('#'+this.elemId).remove();
        } 
        $('#'+this.elemId).css('left',this.pos.x-this.radius());
        $('#'+this.elemId).css('top',this.pos.y-this.radius());
        $('#'+this.elemId).css('height',this.radius()*2);
        $('#'+this.elemId).css('width',this.radius()*2);
        $('#'+this.elemId).css('border-radius',this.radius());
    }
    this.initDraw();
}