Harry potter lego ipad level 3

Hi, I know you asked this question ages ago, but if you're still stuck here's the walkthrough, it's quite long winded, but I've tried to be as accurate as possible.

First of all you need to tap on the invisibility cloak icon in the bottom right of the screen, then walk past Filch. Filch will walk away and the Weasley twins will appear and will see through Harry's cloak. They will then give you the marauders map.
Walk over to the book statue (on the right hand side of room, next to the column) tap the blue circle to perform the spell and create the ladder. Climb up the ladder and stand in top of column to push button so that a rope appears on opposite side of room.

Next, jump down off column and green circle will appear beneath Harry's feet (if it doesn't just walk around the right hand side of room till it does). Tap it to perform the spell and a lamp will appear to the side of the stairs. Use the spell to light it. The bookcase will move and a heap of lego will fall out. Cast the spell to move it up to the other column and two beams on other side if room will move out. Go over to rope, climb it and then carefully jump across the moving beams onto the platform. Jump on the switch/button and a chest will appear at the top of the staircase. Open it to get the key.

Go through the door and you'll be in the corridor. Use spell to destroy the statue to the right of door and and build ladder from the rubble. Climb up the ladder and step on the button to bring down the parseltongue lecturn. Rebuild it, then tap on it using harry and the barrel down the steps will be destroyed. Tap on the dagger to cut the rope and the path will be clear to move on. Now, tap on the witch statue to reveal the tunnel into Hogsmeade.

You'll now be in the tunnel. Tap harry to perfum Lumos spell to enable more light. (Opening the map will help in this as there are dead ends). Destroy the crate directly ahead and walk on through staying close to the wall on the left - tap on the white 'door' furthest away to reveal an opening (white step). Go through it and turn right, and continue until you get to a white door - tap it and enter. Then cast a spell to bring down a weight. Move the weight onto the hook to open the gate partway. Next walk out of that room, and back the way you came, this time keeping the the bottom wall (use the map if necessary). Destroy the two small blocks to reveal another white door. Tap it and walk through, destroy all the crates in that room and light to lamps to make the chest drop. Open the chest and rebuild the lego that appears, then bring the weight down and the gate will open completely. Walk over the gate, rebuild the ladder (you might have to destroy a crate) and then walk up it to enter honey dukes cellar.

Destroy all objects in room to find note for vault code. Then use spell to knock ball off white shelf near trap door to knock crate onto floor. Destroy crate to receive second note, walk up the stairs to get third note and then use spell to move all white squares from floor to gain fourth.

Walk over to vault, harry will open it and then open door at top of stairs using key to enter shop. Talk to girl in way and she'll move. Move man on ladder out of the way and then rebuild display case and move bricks onto side. The witch will thank you. Lastly, destroy the display case on the left and the witch will walk out. You are now in Hogsmeade.