The Sky's the limit
Move your mouse left and right or press the left and right arrow keys on the keyboard to control your character. If you are using a mouse, make sure not to move your mouse arrow outside of the game window, otherwise your character won't move.
You get points for bouncing off the springs (that are on the clouds) and on the rocks as you climb through the sky. Try to collect as many suns, rainbows and butterflies as you can, they will earn you extra points.
When you reach the rocks with the words that make you sad written on them, jump and bounce on them to smash them away.