Here are the very few cheats and glitches on club penguin that still work: 

Stand on pathways:
Click on the pathway/door leading to another room, before you get there, quickly open up your mailbox wait a couple seconds, and when you exit out of your mailbox, you will be standing on the path! You can either talk, dance, wave, throw snowballs, or anything else that doesnt involve moving your penguin.
(Other people can see this)

Stand on walls:
First, you need internet explorer 7. Click here to download it
First, click the zoom button right above your time and click “custom”
Then type in 700 into that bar
Once it is zoomed in, scroll over to the right until you see white, then click it
Zoom back out and you should be on the wall!
(Other people can’t see this)

Many, MANY coins:
Go to the coffee shop and go to bean counters
Earn about ten coins and the press tab until there is a yellow box around the “x”
Hold enter and you can earn up to a maximum of 1,000,000 coins!
(use at your own risk)

Expert levels in Astro Barrier:
Between levels 30 and 31, a blue ship will appear, shoot it

Catch the mullet in ice fishing:
Use a smaller fish as bait

Low definition:
Press the + key to make low-quality vision
(Next to the backspace)
(Used in crowded rooms to speed everything up)

Dessert mode in pizzatron:
Click the lever on the side of the machine underneath of the conveyor belt
(It is harder than the regular pizzatron)