How do you beat bonus level 1 on spider riders

First, when you start, you will see Magma. Talk to him and he will give you some money. Then, go west and go north. Go inside the shop. Give the coins to the merchant and he will give you a bottle. Get it and get out of the shop. Go south. You should see a healer. Give her the bottle and she will give you medicine. Go to the lumberjacks house. Talk to Katy and then go talk to the lumberjack. Give him the medicine. Get out of the house and beat the Invectids . Then go back to where you first saw Magma. Than go northeast. Go inside the Inn. Talk to Magma. Go outside. Then go southwest. Beat grasshop. then go into the forest and you should see a big monster. Beat it and you beat the mission.