Layla/Asteroid 2

Cavern
The second cavern should be pose little threat to Layla. If you are still unaccustomed to the controls, take this stage slowly. If you are a more experienced player, you should be able to tear through the area in very little time, stopping only to collect weapons from each of the crates. Remember to make use of holding down while jumping to get over the tall pillar in the middle of the stage. You can actually bypass a majority of this stage and shortcut right to the fortress entrance if you find the access to the secret room. You can do so by jumping on the first step that leads to a tunnel section early on in the stage and pushing down. Once again, the message on the wall is an indication that the password disk is located at the top of the fortress.

Fortress
This fortress isn't tremendously more complicated than the first one. I simply happens to be laid out in such a way that you may be less likely to find the better passages if you don't search the fortress thoroughly. For example, as soon as you arrive in the fortress, you can push up on the elevator and take a one way ride to a far more lucrative hallway stocked with crates. Once you arrive on the second floor, squat jump through the gap in the ceiling to arrive at a large pile of blocks. You'll need to blast away the bricks to the right, and even toss a grenade to remove the one on the floor to return to the elevator. Then simply take the elevator up one story to arrive at the password disk.

Once you collect the password disk, you will be sent back to floor B1. Here again, you can change to a different floor instead of continuing down the hallway. Drop down to floor B2 where you'll find many more crates and an easier path to the elevator than you will on floor B1. Just don't be tempted to release the green and orange robots trapped inside the bricks with two green crates. Those robots are incredibly strong and the two crates are not worth the trouble. Ignore them entirely continue on. Drop down at the elevator to find the boss.

Boss
The second boss is even less of a threat than the first one since it primarily spends its time suspended from the ceiling. It "jumps" off the ceiling towards the floor, only to eventually return to the ceiling. And it is no more powerful than the previous boss; only one Ax throw will do it in. The trick, however, will be hitting the boss with the Ax. You will have an easier time if you jump in the air, and toss the Ax shortly before the boss bounces off the ceiling. If you time it properly, the boss will fly into the Ax and be defeated.