All mini-games - Enter "?BN" to unlock all the mini-games.
Mini-games - Collect all 100 sandwiches in a level to unlock a mini-game
at the main hub. Use the blue phone booth with a propeller in front of the
level with the completed sandwich to access its mini-game.
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.