READ THE INTSRUCTIONS You probably have to lager the screen. Press the colour buttons to change the colours You can change the pen size Click the erase all button to... well, you know ... eraser to erase Click the pencil just chillin in the bottom of the screen to activate pencil Click down to draw or erase Change button to change the pencil(one of the costume's supposed to be invisible so if nothing appears it's not a lag). Really sorry if there's bugs it kinda happened to me too
my teacher taught me how to do this