Indy needs to get that piece to the other side, which is difficult because he cannot jump the next three platforms carrying the piece without falling. He must put it on the edge of the platform, jump to the next one, and then get it with his whip. Keep repeating this process until you get to the other side, and that piece goes to an engine on that other side, which will still be busted and in need of repair.

Don’t for get to drop down to sub level in that area there and go to the end of a line of coins until you reach the Second Treasure Chest.

On this other side, smash everything until you find a shovel. Have Willie grab the shovel and dig in the water until she finds a key. Use the key on a nearby mechanism, and you will see the creation of a whipping platform. Make sure Willie keeps a hold of the shovel.

There is a wrench nearby that Indy can use to fix the busted engine. This will cause an elevator to rise, which he can use to get to a whipping platform. There is a cage with a front that he can punch open, and a slave will open the doorway you need.

Go into the next room first and defeat the bad guys. There is a round thing in the last room that you must grab and move it to a place in this room. This is a button, that when pushed, causes an elevator to come down. You can take a character (I suggest Willie, as she has the highest jumping ability) and jump up on the platform and then jump up to get the Third Treasure Chest.

The only thing you need to do now is destroy the blockage of the exit by picking up and throwing some dynamite stored in a crate.

This next area has a lot of soldiers here, and stuff to smash. What is really important is the small cave that holds a Lego piece. That has to be stuck on an area all the way to the left, and then that area needs to be pulled out as stairs to another level.

After defeating the guards, you can dig up one section with another special handle piece. There is a shovel nearby if you don’t have it from the last time you had to dig. Stick that handle piece to the right of the cage, and pull on it to free a whole bunch of slaves.