Make sure your pencil touches the color in order to switch to that color. (click on the green flag to reset size) To make your pencil draw bigger, make sure your pencil touches the "+" symbol. If you want your pencil size to become smaller then make sure your pencil touches the "-" symbol. Press the space bar to clear all of your work! Press "s" to stamp a pencil on the board. Use the up and down arrows to make the size of the pen bigger. Use the left and right arrows to change the color. Have fun!