Commander Keen in Goodbye, Galaxy!: Secret of the Oracle

You are eight-year-old Billy Blaze, boy genius to your neighborhood. Commander Keen to the rest of the universe. It's time to grab your trusty pogo stick and neural stunner, climb into the cockpit of your homemade Megarocket and blast off for the Shadowlands. To prevent the obliteration of life as we know it, you'll have to battle your way past deadly hazards and devious creatures, or end up as space toast.

Résumé

In episode one of the fourth episode of the Commander Keen series, "Secret of the Oracle", Keen rockets to an alien planet to rescue the Keepers of the Oracle, who are the only ones capable of helping Keen find out more about the Shikadi.