sombrero hat walkthrough ok first go to credits and move you mouse to the left of pingy(move it to his body or neck or head) and click the ice and to get the sombrero off of the penguin scribble your mouse over it and it should slowly get smaller until it is completely gone.
hidden rifle gun play level 10 and after the clones in 5x5 or something go to the exit but before that check map for anything and see the blue square and go there and theres a rifle
there is a infinite life glitch alright go to strip and play it nightmare and go all the way to back and use barrels and place em where zombies cant come through and go down by the second box and if you are lucky you can get infinite health
in shop if you want to buy something for your duck not lvl increase but the paint and hats and you click arrow for hats and paints and see duck and click menu and there you go