Blow away the rocks away from the robot on the left and get the two cats home. Then, kill and bury all of the robots. When they resurrect, they will be locked behind the rocks and you will have already saved those cats.
Level 135
Pick up the first key and run as fast as you can. If the gorilla chases you, you can still dig a hole with the key. To get the second key, dig a hole and jump through. This is faster than treading water to get to the second key. Make sure you have both locks opened before you use the bomb or both gorillas will be freed and you will be trapped.
Level 161
After you have saved all the cats, grab the umbrella, dig a hole and jump through. Go all the way to the right, then release the rope. There is a hidden fan that will take you up to the exit flower.
Level 166
Note: This is the level with all the transporters. Enter the transporter on your left, then go left two more times. Next, go right, and the last four are all lefts. You will end up directly next to the "exit flower".
Level 49
After you deposit all the cats, get the jackhammer and drive through to the second to last level to get the key. Dig holes to bury the tikis. Dig three holes; by doing this if the first tiki resurrects he will still fall in.
Level 76
When you get to the crumbling floor between the elevators, take very slow steps. If you move too fast you will fall through. If a robot is following you, dig at the top of the ladder to bury him. By doing this, if you fall off the bridge you will not land on him and lose a life.
Level 90
Take the umbrella and the bomb first. This will give you enough time to place the bomb and get out before the robots get you.
Level 91
To get to the cats at the top you must use the warp. Use the second warp from the right at the bottom and you will go directly to them.
Level 100...