Improved lose life of the player

+ Now, when the player lose a life the peguin disappears for 1 sec (and
its invincible too to make sure he got no damage).
+ Added new timer to control the time that the player disappers.
+ Changes in gameScreen to make sure that the player can do nothing when
his/her penguin disappears.
+ Commented Player class.
+ Added splash water when penguin is hitted by a sink harpoon