The sounds are quite adequate for the game and for the system. You have a blip sound effect for jumping, a warning sound when you're low on oxygen in the croc-infested river, a low soundtrack during the river level, a crunching sound when you are crushed by a boulder or when you fall to the ground in the vines level, low jungle music during the headhunters screen, and a long bleep sound when you reach the damsel in distress (this sound occurs when the "level complete" bonus points are added to your score).
Almost identical to the arcade version. I don't think Atari put any monkeys on the vines level. Unlike the arcade version where there are two headhunters, your girlfriend, and a boiling pot of water on the same screen, you have to jump over one headhunter then run until you get to the next screen, then jump another headhunter and run until the screen changes to the girlfriend screen, and then touch her to score the bonus points. But that's the only differences. As with the arcade version, you have to swing on vines. Some swing slow, while others swing fast. If you miss a vine, you lose a life. In the river level, you must either dodge the crocs or stab them with your knife. You can stab any croc at any time unless their mouth is WIDE open. If you try to kill a croc who has a wide-opened mouth, you will not kill...you will become a dead hero, and then you will be in a world of crap because heroes are not allowed to die without permission. You must also watch your oxygen level while underwater. If you run out of oxygen, you immediately drown. On the boulder screen, you have small boulders which roll on the ground (these have to be jumped) and large boulders which bounce in the air (these can be either jumped or ducked under).
Super-easy. The control stick (left and right directions) controls the hero as he runs on the ground, and the fire button makes the hero jump (on the vine level, the only control is the fire button). On the river level, the control stick (using all directions) maneuvers the hero in the water. Down makes him dive, up makes him surface, left makes him swim faster to the left, and right makes him swim slower). Controls are flawless with no lag-time.
One of the best arcade ports that Atari did for the Atari 2600. Although it is not arcade-perfect, it is a remarkable translation for the Atari 2600, and no 2600 collection should be without this fun game.