Marathon is a stand-alone event with a story that consists of 70 levels and lasts two weeks.
The event comprises 7 sequential steps that start once every 2 days. Each step is made up of a series of 10 levels. You receive prizes after completing levels 3 and 10 of each step. Each step lasts two days and ends automatically. If you fail to complete all 10 levels in the time allotted, they disappear, but you can still play the levels in the next step.
In addition, you receive special event points for each level you complete. These points are exchanged for extra rewards. Rewards are given for reaching 5, 15, 30, 50, 60, and 70 points on a special progress bar.