refar, if you want to control the ''length'' of the shadow just make the black copy of the stickman or whaterver taller... then you get longer shadows , you could also probably use the quadrilateral reshape on it to make the top slightly less wide to make the shadow get smaller but thats just my personal preferences XD
if you want to move text, add each piece of text on a new layer and move it with the move selected pixels tool, as for effects and making art, it'd probably be best to check out the text effects section in the tutorials area