How do you get through the trap door on bin weevils mission 1?

Go to mulch island. Then go into the beach where you can buy ice creams and there will be a tunnel at the bottom right of the screen. Go in there and there will be a trail of green bin pet juggling balls. Follow them to find a guard. He will say about if your an sws member and ask a few questions. If you get the answers right, he will let you pass. Go through the door then you will see the masked Weevil run through another door with the bin pet and the door will close. Now you go through the other door and complete the puzzles in the rooms. At the last puzzle you will get a key that unlocks the door that the masked Weevil went through. Go back to that door and get the key out of your backpack. Click and drag the key to the lock and the door will unlock. go through the door and you will get trapped in a room with the masked Weevil and the bin pet. The bin pet is holding a key to unlock the door. When the masked Weevil is on the trap door, pull the lever and he will fall down but the bin pet will hop to safety. Click the bin pet and he will hop on to you and you will get the key. Go back through the door and you will see posh. Click on her and she will talk to you and you will be paid 1000 mulch and fifty xp. Then you will be teleported to the sws HQ and you have done the mission!