Each level has pre-defined task. The gradual fulfillment of pre-defined tasks allows you to collect the points. It doesn’t matter in what order you fulfill these task, but you have to complete them all. Some of the task has to be done on time – for example “ascend 15 000 ft. Express it simply, farther you proceed in your career, then more difficult task you would need to perform. And to do it even more difficult, some of tasks will be flexible, means could be changed, add or remove and some of them shows just after you reach the correct level.