Click on the green play button to begin. You will receive a short tutorial, you just need to click through the explanation.
Your creature has sticky hands, and will send them in any of the 4 directions. Whatever his arms stick to, it will bring you along. So you can stick to the left or right walls, go up or just let go (by clicking on yourself). Your job is to help him get all the stars and then drop into the candy bag at the end. Use your finger or mouse to point his sticky arms in the direction you want him to shoot for.