Metroid

Watch your step as you travel downwards, stop until you see a platform that is two blocks wide and in the middle of the screen. Drop down from the platform above and onto this platform. Once on the platform that is two blocks wide, hold right and drop off. Keep holding right while falling, Samus will miss the red door but will be able to land on the small edge below. From here, you should be able to reach the platform above, fire five missles and enter. This room is just a wide sand pit with a lot of hornets, just keep going and don't stop. Next room is a vertical room with several one block platforms scattered, we won't need them right now. This time fall off and hold left to reach the door below. Blast it open to enter a small room. Take out the hornets, divers and continue on. The missle upgrade awaits you on the highest pillar. After taking it, head back to the vertical room. We're not leaving yet, we still got business to take care of. Once again drop down to the door below by holding left while falling. Enter the room to be in a room that looks similar to the one before. Get pass the divers and hornets just to meet some more with a jumper. Take them all out and enter a room with a bridge. This room doesn't have any secrets, just two red eyes and some sharp teeth that is harmless. But what is in the next door? It would be wise to refill our health first.