To enter this codes go to the credits option which is found in the exit menu. Just type this codes in and the symbol should appear at the bottom of the screen. Please note that these only work if you have downloaded the patch.

What to type	Code Type	Symbol
headbone	big heads	C
buffed	huge players	L
gulliver	big goalies	thermometer
night	spotlights game	fire
low pitch	scary voice	hammer