Thank you! Stage 5 is quite hard! I have a hard time with it, as well. If I remember correctly, your best bet is to attack the skeleton, first. As you attack him, focus your attacks on him, then shoot down the red balls that the bat like thing comes at you with. The skeleton will attack you only if you are in his line of sight. When the red balls come at you, get out of the skeleton's line of sight, get away from the red balls, then shoot them down.