Change Ladder And Plateau Parts:
Toggle the Left Difficulty switch, Right Difficulty switch, or Color / BW switch during game play. 

Jumping Higher:
Jump very high to catch ladders that lead to much higher places. Once up there, ladders can be added to allow even higher travel by plugging in paddles or other controllers in port two. 

Quick Scoring:
Go to the top of the biggest mountain, with the flame. Stand one level below the flame, near the left end of that level. Push Down to sit near that location and your score will rise very quickly without having to collect diamonds or other items.

* represents the flame.
X is approximately where to sit.
_______*_________
_X_________________________
_________ ____________________ 

Secret Room:
Go to the very top of the mountain, where the fire located. Then, move one ledge below and position your character just to the left of the bottom of the fire. Jump left and hold the Joystick in that direction. When done correctly, your character will skip and launch into the air. Just as your character is about to descend, a set of four "dashes" will appear in the following pattern: