|N version||1.2 and later|
Method 1 (Easy)
From the beginning, immediately drop down by pressing right and bouncing off the wall. Use the 45 degree slope at the bottom to stop your fall, then run across and use the slope to aid a walljump off the little hole on the side. It will swing you around the guided zap drone, and you can quickly wallclimb up and fall back down to the next column.
The next part contains 12 pieces of gold clustered in two groups of 6 pieces each, guarded by a zap drone. Follow the zap drone and get all of the gold, then jump up to the gauss turret room. Get all the switches in the area (don't be too eager to get them, otherwise the gauss turret might just snipe you when you least expect it. Instead, wait a little bit for the crosshair to target you and miss before moving.), then fall out of the area. Depending on how fast you did this, the zap drone might/might not have reached the area already. Either way, dodge the drone as you quickly scale the right shaft. At the top area, jump over the three mines - it is actually surprisingly simple to slip into one of them by accident when running. As the rocket nears you, simply jump over it and it will crash into the ceiling.
Dodge all fired rockets, and jump to the exit switch and the exit, completing the level.
Method 2 (Highscore)
Instead of entering the gauss area, use the middle shaft stocked with mines and gold to reach the exit.