Go up and push green lever. Spears will hide. Get down and take green LEGO piece and put it on the correct place. Push next lever and the gate will open.
Go all the way to the right and jump to the other side using the rope. Read the hieroglyphs. Use whip in the highlighted place, take the button and attaché it to the statue. Take the key and use it on the machine. You will make bridge.
You will reach large gate. You need to find blue LEGO piece. Go to the right and use whip to fly above the gap. Build rope for Sallah from LEGO pieces. Go to the right until you get to the snakes. As Sallah jump above them, take the torch and lit wood - snakes will escape. As Indy use whip in the highlighted place to get blue LEGO piece. Go back and pt the LEGO piece on a little lift near mechanism. Use this mechanism to transport LEGO piece to the other side. Go back, take the LEGO piece, attach it to the gate and go through.
Now you need to jump on the correct letters. You need to jump to make word I-E-H-O-V-A-H appear. Letter you need to jump on will blink. When you will "activate" all letters the gate will open.
Go to the right and cross two invisible bridges. Use whip in the highlighted place, take LEGO box and put it on the green pad. Make a lever and push it to open large gate. Cross next invisible bridge and go through the gate.
You will be attacked by a knight. Hit him until he will fall on his knees. Run left and read the hieroglyphs. Get into the room with Graals. Use whip to get on the other side and take the brown Graal.
Go back to the middle chamber and put the Graal on the holder in the middle of the room. Congratulations! You've just finished the game!