This battle is easy. After the intermission sequence, Karel will start flying around the room. He will be firing energy balls, but they only do 10% damage. Karel cannot be harmed. Your goal is to destroy the sleeper. Grab Eckhardt's glove. It is lying in front of his body. Turn around and go over to the pillar behind you. There will be and switch. Press [Action] to use the glove on it. This will cause two ladders to drop. Climb up either one to make it up to the first platform. Look for another ladder to go up to the first platform. You now have two options. Either go to the stone marking and try to jump, or climb up to the third platform and jump from the platform facing the sleeper. An intermission sequence will start that marks the end of the game.