Level select:
Select the Marvin Martian icon at the start game screen, then enter #OP as a code. 

All mini-games:
Select the Daffy Duck icon at the start game screen, then enter ?BN as a code to 
unlock all the mini-games. 

Two player Boss games:
Select the Big Red icon at the start game screen, then enter *JC as a code. 

All art gallery:
Select the Tweety icon at the start game screen, then enter .RT as a code. 

No whack in boxes:
Select the Taz icon at the start game screen, then enter !WB as a code. 

Defeating Gossamer:
When you have collected all the contraptions in Yosemite Zoo, you will enter the 
Elephant Pong mini-game. Pong (scare) the elephant. The elephant will get faster 
each time you do this and scare Gossamer. Get three goals to win.

Defeating Mecha-Tweety:
Wait until his shield is shut down. Then, gobble up a crate and hit him. Do this 
three times. Next, gobble up a crate until the white cylinder is up. Spit all four 
cylinders until their color turns red. Avoid his attacks so you do not die. Finally, 
gobble up a crate and hit all the levers so Tweety can be sucked out.

Defeating Yosemite Sam:
At Disco Volcano, jump all the way to the middle and get the chili pepper. Sam will 
be ready to blow up the dynamite. Without falling down to the lava, breath fire at 
Sam. If you fall into the lava by missing the platform, you have to try again. 

Gladatoons: Trapping Daffy:
Push Daffy to the tunnels that have up arrows all around in the tunnel to the left. 
There is a spring leading to one goal. Daffy would be trapped by going up and 
down if he finds the other path. You wo;; have time to win the game.