Defeat the necromancer's skeletons. Use magic. Slow down time. There are 10 levels in the game. With each level, the atmosphere changes, new types of skeletons appear, and there are more and more skeletons. The higher the level, the stronger and faster the skeletons.
Move the character across the field. The longer you hold down the character, the further the attack goes. Use magic to deal with a horde of skeletons.