To complete this level and get a gold brick, you need to collect 1,000,000 studs. However, there is barely more than one million studs in the whole level, so you must be diligent. You also cannot have any stud-enhancing extras activated, but the studs will come to you automatically (except the ones that are laying on the ground). You do not get to keep the studs you collect in this level. The level records your time, but there is not time limit. The running clock is only used to help you complete the level in a new best time if you wish to do so. You pick your characters in the same way you would in Arcade more or Free Play mode, so you will have all the different character abilities in the game.
What I like to do in this level is start on the edges (which I define as anything between the border walls and the edge of the road), and then work my way around clockwise until the edges are completely devoid of available studs. After that, I go to the inside areas. Here is a list of everything you should need to destroy to complete this level, start on the edge near the start point:
Destroy the 2 pine trees
Blow up the metal module with a thermal detonator, and build the pieces that come out of it into a rotator switch (turning it does not give any studs)
Kill any characters or womp rats walking/hopping around (Gonk Droids are invincible)
Destroy the fence and more trees
Collect the blue studs by the swings and playground/slide area
Plant the flowers underneath the slide. Destroy another fence, and more trees
Destroy the fence by the dewback, but ignore the dewback itself
Destroy the trees in the corner
Walk over the area where the trees were to bloom 19 blue flowers. A few subtle blue dots can be seen on the grass, revealing where some of the flowers will bloom once you walk over that area
Destry more trees, the bantha fence (ignore the banthas), and the bus stop
Underneath the floating house are blue studs and a metal container to up with a thermal detonator, revealing bricks used to build a car. Hop in the car, which will make a trail of blue studs appear. Follow the the trail in the car until they end, and returning back to the floating house
Next to the floating house are trees, a fence, and an empty house frame with blue studs to collect on the inside of it. Smash this area up to build a new house over the frame
In the corner there is a large barrier to blow up with a thermal detonator. Ignore the land speeder past it
There is a house you can use the Force on to make it vanish in pieces, revealing bricks inside it that can be used to build a mini house
Spell "LEGO" with the Force with the large blocks. This is the same as Bonus Level 4 - A New Hope, except you can only use Force on certain blocks, so you do not have to think about the stacking order
There is a black and yellow garage building. On the top of it, collect blue studs. Use the Force on windows and some doors to open them, and smash some of it up.
Destroy more trees
Repair 2 windmills with the Force. Now you can also damage lamp posts throughout the map
Destroy the small yellow house in the corner, revealing pieces used to build a tractor. Build it, hop on, and follow the trail of studs now in front of you. Once you get to the end of the trail, go back
Destroy the next two houses (using the Force on the windows of these houses does nothing). The second one uncovers parts for an AT-ST. Use the Force to put it together
In the fenced in checkered garden area, destroy everything, use Force on the flower pots, and then destroy the flower pots as well
Go to the red garage building to find more trees to destroy and more flowers to plant. Collect the studs on the building, use Force on the windows, smash some of it up, and open the left door by pulling the two levers on either side of it. Pulling the levers for the right door does nothing
Destroy the windows on the tall red building, as well as the trees around it
Use a powerful attack (like Jedi Slam or a thermal detonator) on the ground to the right of the tall red building to uncover parts for a Wookie Flyer. Use the Force to put the part in the left garage of the red garage building to your right on to it. Grab a dewback (you can also use the AT-ST or possibly a bantha, but this is closer) and use it to jump up to the top of the tower. Once up here, build the remaining pieces on to the Wookie Flyer, and use the Force to bring it out of the ground. You can fly it, but flying it will not get you any more studs
Destroy more trees, find studs on the road, find flowers to build, look for any more lamp posts to damage
Go to the middle, and Force and smash up the house there, and the whole area. You will see bricks that you can use to build a truck, that you can drive around and collect another path of studs. Once the stud path stops, destroy the tress and lamp posts, and plant flowers there
Go right, destroy the taun-taun fence and lamp post, and ride the taun-taun through another path of studs that appears once you hop on one.
If needed, go into the AT-ST and blast randomly to shoot anything that may have been missed
Blasting randomly with a normal gunner can also get you somewhere as well
If I missed anything, let me know in the comments below!