How do you finish chapter 1 level 1 I'm super stuck plz help me?

well, after the video, you are in the park. If you want all the coins, play on the playground peices including swinging all the way over, quite fast, and also repeatitivly sliding down the slide. Now you are unable to use animals so do not be bothered by the sandpit or big playground.

To get out after retreiving all coins, go up to the green hampster wheel looking playground peice, and use wingardium leviossa to break it. Use the peices to rebuild it into a bridge across the fence.

Use magic to lift the dumpster and smash the car, giving you the peices to build another bridge. You can run around collecting all the coins if you wish, but do not bother the devil's snare, you do not have the proper spells yet. Now to open the gate change characters to dudley using the X button on DS consoles, and go up to the gate across the bridge.press A and the gate should break.

Use magic to repair the car and move it next to the wall, enableing you to jump up on to the car, and up onto the wall. A bit down the alley you will be attacked by dementors, you would do better to charge your casts by holding down Y and aiming until the circle turns red. Save dudley and go back up to the alley. Go through the gate using dudley to open it, and watch the movie, progresing you to the next chapter in the ministry ^.^