define(function () {
    'use strict';

    return {
        getDeathHour: function (created, minutes) {
            this.setTime(created.getTime() + minutes*60000);
            return this;
        },
        killParticle: function (particle) {
            particle.remove();
        }
    };
});

@@ -110,20 +110,37 @@
         
-this
+return Date.prototype
 .setTime
@@ -180,33 +180,8 @@
 0);%0A
-            return this;%0A
     

Improve core/api.js