Elevator Saga – An elevator programming game (play.elevatorsaga.com)

Strange, that strategy doesn't allow me to get past challenge 2 (just going to every floor one after the other).

www.checkio.org - Looks more like a game, but the programming environment feels more "in-your-face" than elevator saga to me.

Clearing cookies/localstorage should fix that for you, at least until the devs figure out a fix :)

If the makers read this, firstly this is brilliant. Second my feature request would be to have some record of history to watch how I improve (or not) each simulation.

side note: why are you using underscore? I wanted to try your code, but doesn't work out-of-the-box.

Here is another approach that brought me through till challenge #7:

    {   
        init: function(elevators, floors)  // hook up events
        {
            // these are the global wish lists that idle elevators choose from (key are floor numbers, values are number of people): 
            var wishListUp = {}, wishListDown = {}; 

            for (var i = 0, l = elevators.length; i < l; i++)
            {
                var elevator = elevators[i];
                // API: goToFloor(n) [enqueues], stop() [clears queue], currentFloor(), 
                //      goingUpIndicator([set]), goingDownIndicator([set]), loadFactor() [0..1], 
                //      destinationQueue[], checkDestinationQueue() [after manual update]

                elevator.on("idle", function()  // elevator destination queue finished
                {
                    processWishList();
                }); 

                elevator.on("floor_button_pressed", function(floorNum)  // passenger indicates where to go
                {
                    if (this.destinationQueue.filter(function (d) { return d == floorNum; }).length == 0)  // if not already enqueued
                        this.goToFloor(floorNum);  // enqueue
                    // note: passengers coming first need to be delivered first (or at least at all)
                    //       however, the elevator will check by passing, whether one destination
                    //       can be approached before the others since it comes on the way. 
                }); 

                elevator.on("passing_floor", function(floorNum, direction/*"up"/"down"*/)  // if not in destination queue
                {
                    updateIndicators(this);  // indicate next destination from here
                    // we stop here if the queue contains this destination, 
                    // or if a passenger on the global wish list want to go in our direction. 
                    // we can only hope that people check where the elevator is going. 
                    if (this.destinationQueue.filter(function(d) { return d == floorNum; }).length > 0)
                    {
                        this.destinationQueue = this.destinationQueue.filter(function(d) { return d != floorNum; });  // remove from later
                        this.destinationQueue.unshift(floorNum);  // add as immediate next destination
                        this.checkDestinationQueue();  // announce modification
                    }
                    else if (this.loadFactor() < 1.0)  // if there is some space left
                    {
                        switch (getDirection(this))
                        {
                            case 1:  // going up
                                if (wishListUp[floorNum])  // are people waiting to go up from here?
                                {
                                    //if ((1.0 - this.loadFactor()) * 10.0 - wishListUp[floorNum] > 0)  // assume capacity for 10 people with regular weight
                                    //    delete wishListUp[floorNum];  // mark as visited
                                    this.destinationQueue.unshift(floorNum);  // add as immediate next destination
                                    this.checkDestinationQueue();  // announce modification
                                }
                                break;
                            case -1: // going down
                                if (wishListDown[floorNum])  // are people waiting to go down from here?
                                {
      ...