after you defeat all the planets (ice,fire,jungle)
you go into the asteroid belt
and you will find a blue building
then you click on it
you go up the blue rocks
and then you will see a key , click on it
it will spin into a portal
click enter the portal.
You will come to this castle thing
go to the ground
there you will see what you think is the princess, click on her
she will ask for the three mystical weapons
you will give them to her
then she will turn into Mordred
he will go through the puzzle door
you will click on the door
it will be a puzzle
after you defeat the puzzle you will go through the door
there you will find the princess in a green jar.
The Princess has been kidnapped on Astro Knights island. (see the related questions)
in her room
you beat Mordred that is on a metier [location x83 y3] when you get all three weapons
Only to the Princess, who is not interested.
in the asteroid belt
The mouse is not in the Princess's room. It is in the room of the Princess's maid.
you can skip the puzzle if you don't talk to the princess (which is really Mordred) and click on the door.
i don`t know.i`m kiding you talk to the queen and king.
You don't, you have to get to princess tower by using your rope, shooting at the door on the princess tower, then go insde and find the message, then go back to the mueseum and do what the note said
There is a note on the far left of the room.