Use A and D or the Arrow Keys to move left and right. Left-Click and hold to launch your tongue. It will stick to walls and pull you up. For a harder challenge, try to find the eight hidden penguins as you pull yourself to the surface!

If you'd rather play with they keyboard, Right-click to toggle mouse support. With the keyboard controls active, press SPACE to launch your tongue.

HINT: Higher up the cave, some walls are covered in green slime. Your tongue will bounce off these walls.