You shoot the arrow at the tower to the left then jump on the rope and go in the tower. hope this helps!!
on astro-knights.
You shoot them
get the rope from the wodden thing in the mud next to the mill, then put the rope on the arrow, and shoot it towards the castle.
This happened to me at first too. You need to have pulled the lever and the dragon will have fallen asleep, then run to the front of the dragon and shoot the arrow there. It will fly up into its mouth to hit it. Do that two more times after the first and you will defeat it.
The crossbow will let you create a way into the Princess tower. Get the rope from the water wheel at the mill and tie it to an arrow. Aim up to the left and shoot until you hit the door.
make him shoot the chandler on him
You just aim and click. The only time it is effective is when it goes into the dragon's mouth when there are no flames there (you have to put it to sleep for a second or two). Climb around the back, dodge the spike ball, and pull the lever. (see related question)
*You can only use the Ice Arrow when the dragon is "asleep" for a few seconds, with its eyes closed and mouth open. You create this by climbing OVER the dragon to the back, then slipping past the spike tail to flip the lever on its back. VERY QUICKLY jump back in front of the dragon and shoot an Ice Arrow into its open mouth. (You have to do this whole process three times.) To shoot the Ice Arrow, click on the icon at the lower left, and aim for its mouth, then click again to shoot.
To reach the left-side tower of the castle (the Princess room), you need to use the rope from the Mill. Tie it to the arrow on the giant crossbow and shoot it left and up to hit the tower door. (You get many tries.)
The giant bow and arrow are part of the defense of the castle, and managed to shoot down some of the invaders. Get the rope from the right side of the mill, attach it to an arrow, and try some shots up and to the left. With luck, you will hit the Princess tower and you can walk the tightrope to it, finding the Princess message inside her room.
jump from the rocks to rock then go in the valcano and watch out for the heavy sparks then to do the dragon jump chain to chain then pull the lever shoot the ice arrow in his mouth 3x done with fire planet
Go behind the monster, climb on its back, pull the switch, then go in front of the monster and shoot the ice arrow into its mouth. Do this 3 times and you will defeat the monster.(see the related solution)