The lovely princess Lala was kidnapped by the Evil Demons of the Empire. You are Lolo, a round ball-like creature (just like the princess herself), and your mission is to sneak into the empire castle and to liberate the princess.
This is a puzzle game. Each level is a castle room. In each room there are hearts you must collect. It is not always easy, since there are enemies who will prevent you from accessing a heart. Once you collect all the hearts, a treasure chest will open and activate all the creatures in the room, even those who were not hostile until now. You must quickly cross the room to the exit which is now available.
The difficulty level increases with each room, and after a few levels there is an especially hard room with tougher enemies.