Method 1 (NEHS)
As the name implies, in this level you have two choices. You can play it safe and play the lower part of the level, or you can be Mr. Greedo and go with the top level. You do not necessarily need the gold at the top to beat the episode.
If you are not going for a high score, then you should go ahead and take the lower level. Take the non-gold path below.
If you are, go for the gold. Be forewarned, the top level is very difficult. You can make it easier by drawing out one of the guided zap drones by standing under the one-way wall. Activate the terminal, and try to stay above the thwumps. Keep moving to avoid the rocket, and, above all, if you think the top level is too difficult, after you've died about 5 times, don't hesitate to play it safe and go with the bottom.