code.js

var save_squares = {};
var dingsave = function (actor) {
    // A checkpoint; saves your game and goes 'ding'
    if (actor.type === "player") {
        grid.tiles[actor.x][actor.y].hash = "_";
        if (!save_squares["" + actor.x + actor.y]){
            save_squares["" + actor.x + actor.y] =
                {color:actor.color, tilemap:brief_tilemap(grid.tilemap)};
        }
        transitions.push(function(){
                             if (callbacks.ding)
                                 callbacks.ding(count);
                             count = 0;
                             grid.tiles[actor.x][actor.y].hash = "_";
                             actor.color = save_squares["" + actor.x + actor.y].color;
                             grid.tilemap = unbrief_tilemap(save_squares["" + actor.x + actor.y].tilemap);
                             actor.save(grid);
                         });
    }
    return true;
};