Your objective is to activate the portal at the end of each level to complete the level. To activate the portal, you have to collect a certain number of stars, which are scattered across the level. You can see the number of stars you need to collect at the upper right corner of the screen. Some stars will be easy to collect. Others will be resting on higher platforms or behind locked doors that will require you to solve some puzzles to reach. In each level, you can also find a hidden treasure chest. The roads to these hidden chests are hidden until you come close to them, so you’d better inspect every corner of the level. There are also enemies in each level that you can either avoid or defeat. You should stay away from the horned enemies because they will damage the Red Ball upon contact, but the hornless variants can be killed by jumping on them. Pay attention to your lives at the upper left corner of the screen. Once you go through 3 lives, you will lose the game. Keep an eye on the time limit, too, because you have to complete each level before your time runs out. Plan your actions carefully and try to finish every level with 3 stars!