Intruder

Return to the previous room and take the right door. Notice the Power Bomb Tank is missing.

Head right and climb the ledge above.

Crawl under the wall as you see a space pirate walk away with the Power Bomb Tank.

Climb the ledge above you and head right after the space pirate.

Go right and drop into the small pit. Wait for the eye (a security sensor) to pass behind the blocks below before dropping onto them. Wait on the left side of the blocks so the eye doesn't see you.

Wait for the lower eye to drop behind the block below before you drop onto it.

Crawl right to see a third eye. Wait for it to pass behind the blocks above.

Climb the ledge above and crawl under the blocks.

Climb up the lower blocks and crouch so the eye doesn't see you on the way down.

Wait for the eye to go down behind your blocks, then climb to the top of the shaft and go through the door there.

This room is filled with space pirates. You are going to get seen, so just run right and stun anyone that gets in your way as you climb under a wall and run into the next room.

Run right and jump up the platforms, then jump left to the tunnel and crawl left to the next room.

Crawl left through the long tunnel and run left to the next room.

Jump up the series of platforms and enter the door at the top.

Run left off the ledge and keep running past a bunch of space pirates. Start jumping up the platforms at the left wall.

Once at the top, start running right and climb under a pair of walls as you shoot the 2x2 blocks in your way.

Continue running right and jump the gap. Turn left and shoot the block to send all the space pirates falling down to the ground.

Wait for the security gate to open, then go right and use the save room.

Head right and jump up the series of ledges.

Go left through the door at the top to start a boss battle.