Game: The Return of Medusa: Rings of Medusa II

It hs been many years since Cirion, Crown Prince of Morenor, vanquished Medusa, an evil sorceress-turned-goddess, and her hellish army. But the very night before the Prince's coronation, he was confronted by returning Medusa, who declared her intent to travel to the future, where Cirion would be long dead and there would be no-one to stop her from gaining absolute control over his land. Cirion followed Medusa through the rapidly-closing portal, emerging 300 years into the future. The task of Cirion is to find thirteen keys to her lair, defeat Medusa once and for all, and destroy the source of her power, dark crystal Dohor.
Each game uses different controls, most DOS games use the keyboard arrows. Some will use the mouse , "Alt" ,"Enter" and "Space bar".