Fiddled with the duck management code a little bit more

Issues:
- The duck drags the player down, have to find out what is going on (I
guess it probably has something to do with the physics)
- The player's health bar seems to act according to the player's
rigidBody, giving a funny effect once it collides with something. Not
sure if bug or random feature.
- Fixed the display of the Duck message... mostly.