Suppose there are options of chase, mission and challenge.
Click on the task.
Enter your name in the name bar.
Then click ok.
Now start chasing.
Throw bottles and kick the balls with finger clicks.
Moving ahead, catch a robber by running fast and then punch him hard.
Collect coins by running in the straight line of coins.
Take every bottle from the ground which comes on the way and throw it towards the robber.