How do you beat level balins tomb?

You mean mines of moria? When you start out, Pippin falls in a hole. Go to the right and use sam to light fire. Key will drop. Use key on chest to the left and you will get a gear. Go to the well in the center and use the gear on the wall. Then destroy two boxes by the well and you will be able to build two roofing sections for the well. Then go to the left and destroy the cracked block with Gimli. You will get crank. Use crank on wall by well and turn it. Then orcs will bang on the door. Use Legolas to shoot two targets, and ropes will come down. Then go to door and build two piles of weapons. Go back to the ropes and jump on one. Change Characters and jump on the other. Now orcs will come in. Keep killing them until troll comes in. Then build platform in center, where balin's tomb was. Stand on the platform and troll will get his mace stuck in it. Then he will get it out and come after you again. Switch to Legolas and go to right. Jump on rock with green thing and jump to ledge. Destroy big rock and build another platform. Then make sure your bow is equipped (this next part will not work if your daggers are equipped.) Stand on platform until troll's mace gets stuck in it. Then jump on mace's chain and shoot troll's head. Repeat this process on the other side of the room. Then Frodo will get stabbed, and you will be Pippin on the troll's back. Repeatedly attack the troll until it stays still. Then switch to Legolas and shoot the troll's head. Pippin will be thrown off. Switch to Gimli, Sam, Pippin, or Merry and make sure the troll is following you. Then lead him over to the right. You can build a crawl space here. Crawl through and go to the yellow circle on the ground. Press special ability button (Z on Wii, B on Xbox.) You will be on troll's back again. Again, keep stabbing until the troll stays still, and then shoot the troll's head with Legolas's bow. Repeat this process on the other side of the room. Then you will be under Gandalf's force shield. Destroy all the orcs that come under the shield, and Gandalf will warn you of a balrog. He will run away. Follow him. A fire will start. Go to puddle on left and empty it with Pippin's bucket. Then use that water to put out the fire. With the fire gone, there will be a pink gear. Use Gandalf to levitate it up to the pink hook on the wall by the door. Then destroy cracked block on right with Gimli's axe. Pieces will come out. Build them. Then push minecart into the wall. Destroy the barrel by the door to get a crank. Use it by the door and turn it. Then go through the door. Walk down the stairs until bridge breaks. Then pick up Gimli and throw him at cracked floor on other part of the bridge. Switch to Sam and build crawl space. Then go through. Jump on rope and crawl across. Make fire. Switch to Legolas and go to the left. Shoot two targets. Then go across the bridge. Gandalf will fall in pit. As Gandalf, hold jump button (A on both consoles.) You will get sword. Hold down A again and you will jump on balrog's back. Repeatedly attack it until you fall off. When it blows fire on you, crawl to the left and right to avoid fire. Repeat this process until you turn back into the rest of the fellowship. As Legolas, go up stairs and shoot targets. You will have to shoot each target twice. Then jump up poles to get to ledge. Go to left and destroy box, making a ladder go down. Switch to Gimli and climb up ladder. Destroy cracked box on door and go through door. Level is beat. Hope that helped.