At the beginning of the mission, a floorguard, followed by a zap drone train, comes. Jump over each. Then it's safe to walljump. There's a switch up there. Go there and grab the switch and slide down the wall. There are 10 thwumps and half as many mines than thwumps. Run to the left, while avoiding the thwumps, two laser drones, and the mines. Use the launchpads to end the mission.