The Lost Vikings find themselves on a spaceship and must work together to reach the exit.
Reach the Exit
Have Erik jump over the laser. You will see a message when you go past the ? button. It will tell you how to use the ? button. Climb up the ladder and go all the way to the right to reach the exit.
Switch to Olaf. Wait for a laser to go past, then fall of the ledge. Be sure to block the next laser with your shield before climbing down the ladder. After going down the ladder, go all the way to the right to join Erik at the exit.
Switch to Baleog. Go through the door and use your sword to kill the green alien. Or you can shoot an arrow at it. Then go down the ladder, and go all the way to the right to finish the stage.