Ice Beam & Spider Ball Search

Walkthrough: After obtaining the Bomb, return the door in the large area you passed to get it. Use the Bomb to lift Samus into the very small passageway to the right, and then Bomb the pink block that is hindering you from entering the next room. Here, there will actually be a Teleportation Statute that will take you between areas. From here, enter the next room. You can't go up, so instead, break through the floor to go down. You pass a door that contains one of the Missile Expansions.

Go to the lower level and enter the area to your left. However, you'll quickly discover you won't be able to get back up to leave. So use a missile instead on the red barrier in front of you to access the next room and receive the Ice Beam. There will be another room in the same area you obtain the Ice Beam, but it will be one you won't be able to go in for awhile. Instead, Freeze the enemy to use as a platform to leave this area and reach the exit.

Head back up to the area you originally couldn't move upward. Use your Ice Beam to Freeze the two enemies and do as before with using them as platforms to reach the next level. If they thaw quicker than you need, Charge your Ice Beam before shooting them. Jump up and then open the door to your right. Save at the Station resting just above, and then curl up into a ball and slide into the very next room. Shoot the door real quick to open it on both ends, and then return to the previous room to head through the now open doorway. At the bottom of this room is the Spider Ball Upgrade hiding behind one of the blocks. After obtaining it, use your Bomb to get through and exit the room the same way you came in.

Missile Expansion 1: Leave the room that has the Teleportation Statue by going left. Drop through the floor and enter the door to the right. On the right side of the room, jump on the ledge and crawl through the opening. At the very end, you will have to Bomb your way into the room that holds the Expansion within.

Missile Expansion 2: Head back to the Save Station near where you got the Spider Ball. Cling to the wall on the right to scale up straight to the Expansion.