At the very start, hold right, jump to the next slope, and then jump again with speed to reach the switch. Drop down, hit the next slope, jump again to the next slope, and then jump really high again. The jump should let you get the switch and send you straight to the entrance of the next level. At the next level, try to use a perpendicular jump to get the switch. There are two guided zap drones in the next compartment. One should be moving rightwards. Quickly run underneath the drone going rightwards, so it won't notice you. Then perpendicular jump to leap over the second drone, while simultaneously grabbing the door switch.