After you defeat the gold jetpack jumper, you continue on to the third part of the alien spaceship.

Explore the Spaceship

After you defeat the gold jetpack jumper and go east, pick up the four hearts and the Laser Gun while dodging the spiked balls and robot. Hit the north wall and go in to get a Lightning Gun, then go south to the previous room. Then go east to reach the next room.

Jump east across the tiles while dodging the floating robots, but be careful of the tiles that open and close. Don't jump on them when they are open. Go east to the next room.

Don't step on the differently-colored locations on the pipes. Try to go east on the pipes, jumping north or south to avoid getting hit by the differently-colored sections. Keep going east this way until you can go through the east door to the next room. There, you will battle Ostroid.