To be able to lick up pathed enemys colect all coins
on every level. Then go into options, then extas.
Go to the bottom of the list and turn on feeding
Double-tap the Power Jump button to
hop over larger-sized gaps or up onto high ledges.
Use your tongue to snack on assorted insects and fish.
Some of them contain power-ups.
Collect all the gold coins on each level, and you will
be rewarded with a 'secret' specific to that level.
Open All Levels:
Press up, down, left, right, right, right, down, left.
Press down, down, up, down, right, down, up, up.
Open All Characters:
Press left, right, left, left, left, up, left, left.