|N version||1.3 and later|
Method 1 (Easy)
Though the middle homing turret may seem imposing, this is a fairly simple level. Hit the vertical launchpad at the left and walljump off the first bounceblock, which will give you enough speed to reach the top. Jump over to the exit switch, then slide down the right side, grabbing the gold and landing on a bounceblock at the bottom with the door switch. Immediately jump over to the left bounceblock and get that switch, then get the two other switches on the side. The diagonal launchpads can propel you to the switches while dodging the rocket. After that, either hit a vertical launchpad and exit through the middle right (easy), then jump down and get into the exit, or use the launchpad to clamber to the top, walljumping off the ledge to pick up some additional gold. Then drop down, using the bottom slope to stop your fall.
The two gauss turrets should bother you that much.