Use your keyboard or mouse to navigate your character through a cave. Press A or D or use the left and right arrow keys to move. To launch your tongue and stick to walls, click and hold the left mouse button or press SPACE. You can use your tongue to pull yourself up to higher areas. As you make your way to the surface, try to find the eight hidden penguins for a harder challenge. Be aware that some walls in the higher parts of the cave are covered in green slime and your tongue will bounce off them. Keep an eye out for these slippery surfaces and plan your moves accordingly. Keep climbing and see how far you can go!