[Overview]
Secret 1 - Secret dead bunny killed by secret ninja chicken (tm)
In the second yard, in a spot on the left hand side, find this scenario.
Secret 2 - Secret Serious Bomb
Andrej found this one: The secret in Wong Pong is hidden at the second plaza (after the first gate closes behind you). Passing under this gate turn right a you will see a barrel on a balcony of one of the houses. Throw a grenade at this barrel and a Serious Bomb will fall down towards you. This secret is actually pretty lame for there is a bug here that cost me two additional hours of searching. If you climb the portcullis from the first plaza a shoot the barrel from up there before actually entering the second plaza, it just dissapears without giving you the secret so beware :)
Thanks!
Created October 23, 2005 Peter Holzwarth.