Become a builder
Your task is to get rid of all five balloons. Approach each of them, press [H] and then choose the red cross #1. In case of balloons which are out of your reach, keep the button pressed for longer - it will allow you to aim at the object #2.
Approach the tree, press [J] and then choose the copy option. Plant the new tree beside #1. Plant five trees in the same way. Now choose to test the level - from the menu, or by holding down [K]. You have to collect 2,000 studs. Mere trees won't be enough. Return to build mode, press [K] and choose studs - place two blue ones anywhere and choose the test mode. Collect both coins which will give you the needed 2,000 and walk into the opened cabin #2.
Use [J] to raise the water level and [H] to lower them. Your task is to shape the terrain so that all fish are in the water #1 and cats on land #2.
Open the menu with [K] and choose whichever vehicle. Place at least one vehicle in each of the four depressions #1. Switch to test mode. Enter each vehicle and ride onto the pressure platforms #2 which will light up the bulbs.
First you have to finish the road - place four adequate parts. Choose a proper plate from the [K] menu #1 and place it in the empty place. If the plate isn't facing the right direction, you can turn it using [H] while standing in the middle. Eventually enter test mode and ride to the pressure platform on the other side #2 - of course you don't have to stick to the road.
Bonus level 1
Your task is getting 100,000 studs. You can collect them on foot #1 or by entering one of the vehicles #2 running over everything in sight. The second option is of course the faster one. In the area of the field you will also find violet studs which will give you 10,000. After collecting enough, head to the upper part of the level where you will find a Gold Brick behind the previously locked gate.
Bonus level 2
You have to enable Ron to reach you. Stand on the buttons #1 starting from the right side. The next platforms will start moving and the second character will be able to jump onto the further islands. Once it gets to you, switch to Ron and use Scabbers. Enter the tunnel and press the button at the end #2.
Once the gate opens, move on and stand on one of the button #1 - the second character will stand on the other one. Jump on the platform and you will get to the Gold Brick #2.
Bonus level 3
You have to prepare the Strengthening Potion. Jump onto the bench on the right - you will be lifted into the air, from where you can take the first ingredient #1. The second is in the flowers #2.
The last one can be found on the left #1. Drink the Strengthening Potion and pull the chain #2.
Jump onto the platform and use the wardrobe to put earmuffs on #1. On the right you will find a Mandrake, thanks to which you will break the glass window with a button behind it #2 - step onto it. The second character will stand on the other button.
Move the platforms #1 to the middle with (WL), so that you can easily get to the Gold Brick #2.
Bonus level 4
Use Scabbers to enter the tunnel, on the end of which there's a button #1 which will lower the platform. Use (LS) on the Devil's Snare to unlock a passage and jump into the water. Get onto the surface and get into the wardrobe to put earmuffs on. You will find the first potion ingredient in the left corner and the second one in the lower right #2.
Grab the Mandrake and break the window by the cauldron #1. Approach the wardrobe with signs with Hermione and press them in the order in which they were lightened #2. You will get the last ingredient.
Drink the Strengthening Potion and pull the chain in the wall on the right #1. Jump onto the platform and roll down the ball. Roll it into one of the two holes in the water #2.
There's a crank by the wardrobe - turning it will increase the water level. Swim to the right edge and use (LS) to get rid of the Devil's Snare #1. Roll the ball into the water and lower its level. Roll it into the second hole. The gate will open - there's a Gold Brick behind it #2.
Bonus level 5
Head left and get rid of the Devil's Snare with (LS) #1. Use Scabbers to get through the tunnel to the other side, stand on the button and wait for the second character to stand on the button on the opposite side #2.
Move on and enter the next tunnel - it's blocked in the middle. Switch to Hagrid, pull the chain #1, switch back to Scabbers and go to the end of the tunnel. Once more stand on the button and wait for the other character to stand on the second one. You will reach a cauldron - you have to create a potion. All the ingredients can be found on the pillars - collect them #2.
Drink the Polyjuice Potion and choose one of the Ravenclaw students. Return to the very beginning of the location and wave by the gate #1. Right behind it you will find a wardrobe, in which you can put earmuffs on. Pick up the mandrake and take it to the very end, to the cauldron and destroy the glass window blocking the pipe. Switch to Ron and use Scabbers to get to the brick #2.
Bonus level 6
NOTICE: You're surrounded with quicksand, falling down will end with death. Approach the crank on the left - you will lower the first platform. Jump to the left and use (LS) to chase away the Devil's Snare #1. In the corner you will find a teleport - it will transport you to a different spot. Turn the second crank #2 - you will lower another platform.
Use Scabbers to get through the tunnel to the other side and stand on one of the buttons #1. The other character will automatically stand on the other one - the door will open. The crank by the gate opens it and the one inside turns the quicksand into water #2.
You will find the first potion ingredient right in front of the gate. To get the second, cross the narrow passage behind the tunnel #1. Jump into the water and swim to the right. There you will find another teleport #2.
Chase away the Devil's Snare using (LS) #1. Swim to the other side and turn the crank - you will lower another platform. Also take the last potion ingredient #2.
Switch to the second character, jump onto the lowered platform and turn the crank #1. Return to controlling Ron and place the last ingredient into the cauldron. Change your character to one of the Slytherin students and return to when you begun. Wave by the gate and collect the Gold Brick #2.
Bonus level 7
Go right with Harry - eliminate the Dementor (EP), get rid of the Devil's Snare (LS) #1 and turn the crank - you will unlock the passage in the tunnel. Switch to Rona and enter the tunnel with Scabbers #2 - you will activate the platform.
Jump onto the platform on the left with Harry and teleport to the second part, taking a potion ingredient from the pillar on your way. Get rid of the Dementor (EP) #1 and throw the ingredients into the cauldron. The second one can be found on the ground on the right. The last one is behind the tree, in the corner. Drink the Strengthening Potion and pull the chain on the right #2.
Switch to Ron and jump across the platform #1 to the wardrobe, where you will put earmuffs on. Return, grab the Mandrake on the right, next to the pipe. Take it to the other side, where you will break the window #2. Turn the crank to open the door.
Return with both characters #1 and stand on the buttons by the gate, with a brick behind it #2.
Bonus level 8
Go straight and defeat the Dementor (EP) by the cauldron #1. Once you kill him, you will receive a potion ingredient. On the right you will find another ingredient. Walk into the teleport - the last one is upstairs. Drink the Polyjuice Potion and change to one of the evil characters which use (DM). Head up once more and destroy the black sphere (DM) #2 to unlock the tunnel entrance.
Switch to Rona and enter the tunnel with Scabbers - press both buttons on the right side and you will open the gate #1. Move on and create a bridge from the bricks (WL) #2.
Afterwards move (WL) both platforms to the right, so that you can move on #1. Jump further so that you can reach the next gate - stand on the buttons with both characters and eliminate the Dementor afterwards (EP) #2.
Move to the left - on your way you will come across another Dementor (EP). Get rid of the Devil's Snare (LS) and turn the crank #1. Jump through the platforms up, until you reach the gate. Jump along the mushrooms #2 onto one of the buttons - the second character will do the same on the other side. In effect, you will open the gate and find a brick.
Bonus level 9
Stand on one of the buttons #1 and the second character will stand on the other one. You have to create an Aging Potion. Use the bricks (WL) to construct two more buttons - you will unlock the gates on the left and right side. On the left you will find a teleport #2 - turn the valve, return and pick up the ingredient.
Switch to Ron and use Scabbers to enter the tunnel #1 at the end of which you will find a button which will open the door - jump onto the platform and take another ingredient. On the right you will find three colourful bricks, from which you have to arrange (WL) the "E" letter #2.
A bit higher you will find a wardrobe - put on the earmuffs and grab the Mandrake. Break the window with the next ingredient behind it #1. After completing the Aging Potion, drink it and go through the barrier. Reach the cauldron #2.
Bonus level 10
You will find the first ingredient right next to the cauldron. Head left while jumping across the moving platforms. Use Scabbers to press the button at the end of the tunnel #1. Put on the earmuffs in the wardrobe on the right, pick up the Mandrake and break the right window - you will find another ingredient #2.
Construct a bridge from the bricks (WL) on the right #1. Go up, destroy the spider and move the platform (WL) onto the brick on the right, so that you can jump and get the next ingredient #2.
Drink the Strengthening Potion and pull the chain by the door on the right. Chase away the Devil's Snare with (LS) and jump onto the broom. You have to fly through four circles #1 to open the door at the end. Create a staircase from the bricks (WL) #2, one of the ingredients is on the pillar.
Jump onto the bench - the second character will use (WL) to lift you into the air and collect the second ingredient #1. Destroy the tree on the left - another ingredient of the Polyjuice Potion will appear. Chance into a character with an animal or just into Fang and then dig out the two buttons #2.
The Aging Potion ingredients can be found behind the paintings and walls #1. Use, starting from the left side: a Slytherin student, Hufflepuff student and Ravenclaw student. Drink the potion and go through the barrier to get the brick #2.