As a Winx angel, you have to collect stars and make it up to the pearly gates before your energy fails you. As soon as the game starts, your energy starts dropping. You can keep an eye on your energy level in the upper right corner of the game. You need to collect enough stars to complete the mission, but you must also collect enough hearts to keep your energy level high. If your energy level hits zero, the game ends and you fall. Try not to hit clouds or demons, as they will both take away your energy and slow you down.