Robo Warrior/Period 2

Period 2-1
Bomb as much of the starting area as you like in order to search for items. Then proceed up the vertical channel to the section that divides into four paths. There are two stairwells to underground tunnels that you can visit to give your inventory a boost. One is on the way to the bottom path, while the other is inside the second path from the top. You can proceed right from any of the bottom three paths. If you happen to take the top path, you will have to bomb the wall at (1) three times to create a gap that you can pass through. If you take the bottom path and you have plenty of Hyper Missiles, you may wish to use one to blast away all the trees ahead of you.

As you approach the water, you can blast some of the trees along the bottom of the stage to reveal a Waterproof item. However, since this stream is only one tile width long, you can actually pass straight over it without harm as long as you do not stop. Once you're on the other side of the river, you can bomb the wall at (2) to find a treasure room. There are no bad statues in this room, you can find a Lamp, Super Bomb, and Waterproof item from left to right. This is actually your only chance to collect a Lamp since it is unlikely that you will have collected 20 Award Medals in Period 1, and it will definitely come in handy in the next stage so don't miss it.

Right outside the treasure room, you will come to a straight vertical wall. Near the wall is a flight of steps to yet another underground tunnel. Visit the tunnel to collect more items and points. In order to proceed, you must locate the one spot on the wall that is vulnerable to being broken with bombs. It happens to be slightly above the level of the steps, at (3). Bomb it three times to create a gap.

Once you get past the wall, continue to bomb trees around the upper portion of the stage. Further in, you will find both the Key that grants you the ability to exit the period as well as a set of steps that lead to a fourth and final underground tunnel. Assuming you still have a good collection of candle, go ahead and visit the tunnel to collect more items and points. These are good opportunities to get your score up to increase your ZED's performance level. Once you're done and have collected the Key, head all the way to the right to find the exit.

Period 2-2
When you begin this period, it will be quite apparent that you are thrust into darkness. Assuming you collected the Lamp from the treasure room of the previous stage, now would be an excellent time to use it. Once you use it, the entire Period will be lit up, even if you happen to pass down into an underground tunnel (which will not be lit up, you'll need to rely on Candles.)

If you do not have a Lamp, you will have to use up your supply of Candles in order to have any vague idea of where you are and where you're going. There are a few Candles hidden underneath the blocks near the starting area. There is also a staircase hidden nearby, but if you didn't have a Lamp to light this period up, you'll want to skip the tunnel and save your candles for the regular area.

As you approach the water, there is a Waterproof item nearby, and you'll absolutely need to use it. The river is too wide to hop across and survive. On the other side, you have a choice. You can take the upper path, and bomb a gap in the wall indicated by the (1). Or you can snake around the lower path to access the rest of the stage.

The period splits up into another upper and lower path around a crooked wall. Near the very end of the stage, you can find a wall to bomb at location (2) which will lead to a treasure room. This one contains 5 statues, and you can obtain items from 4 of them as long as you don't bomb the upper right statue. You can collect a Candle, a Waterproof item, a Crossfire, and 10,000 points. When you're done, head back out and bomb the blocks in the middle passage to find the Key.

Collect the Key and begin bombing the blocks along the bottom passage in order to reach the exit. Along the way, you will uncover another staircase to a tunnel below. Again, if you used a Lamp here, feel free to drop down and collect some items. Otherwise, avoid it and save your Candles so you can find the exit. That should be an easy task since all you must do is continue heading right, and then straight up the tunnel to the exit.