Advance through the levels by filling in more than 80% of the screen.The deamon won't get you but he will send fire to find you.You can dowse the fire by filling the screen while the fire is on your tail.
Reimplementation of the 1988 game with the same name, (it's also known
as Nebulus). In the game you have to climb a tower with strange
inhabitants that try to push you down. Your only defense is a ball you
can throw and your skills in avoiding them.