Every now and then, Giygas' mothership will flash on and off. After this, Giyags will appear and use one of 3 PSI attacks to disrupt gameplay until he is defeated. Wait 10 seconds to see the mothership effect. Giygas will be a stage boss. I haven't actually put him in the stage yet.
@csf6043 - can you make me some sprites for Giygas?
