The player movement

Having to send the game width and height was not necessary as it can be
taken directly from the Game class.
Polygon Movement

Having to send the game width and height was not necessary as it can be
taken directly from the Game class.
Enemy Movement

Having to send the game width and height was not necessary as it can be
taken directly from the Game class.
Shape Movement

Having to send the game width and height was not necessary as it can be
taken directly from the Game class.
Removing unneeded comments