These things just fall and rise. Pass under the ball when it is up, and you'll be all set.
Spike Fence
You can only avoid the Spike Fences by jumping over them.
Ball Puzzel
These dangerous Balls will roll around the room. Hitting them will change their direction. You'll need to get all the Balls in the Hole to open the passageway to the next room.
Alien Monster
Alien Monsters disappear and reappear with a deadly shot in many directions.