Use the arrow keys to move the block. Hint for those who haven't figured out 3D: all of 3D is an illusion created by pen. Pen is the key to 3D, you just have to use it. P.S. I don't think anyone has done 3D like this, so check the inside of this project out! I even put a dozen comments or so to help you out!
Credit to Me, Myself, @jj442, and I. Leave a love and fav, and if this project gets enough hearts i'll make a 3D tutorial. I am such a cheater.