First, tap on Kiran (the sprite at the start of the game) and she'll talk to you. After the backdrop switches to the space ship, immediately press the space key so another sprite will appear, tell you something, and then disappear. Then, wait for Kiran to say something then she'll go to another backdrop and she'll tell you the task. To draw with the pencil, Tap on the arrow keys to move the pencil and draw at the same time. As Kiran told you, press the W key to erase all (erase your drawing). After Kiran tells you "Nice drawing, friend!", it's the end of her speech and you can peacefully draw or play again by tapping on her. To stop the game, tap on Kiran so it'll go back to the moon backdrop and then tap on the red stop button to stop the speech and game in general.