On the saucer Excalibur, you must enter coordinates before the ship will launch. (see related question)
You do not get or use a bucket on Astro Knights Island.
There is no treasure chest on Astro Knights Island.
There are no bird eggs in astro knights island.
its on the island
How do you talk to the girl in the hay loft at astro knights island?
The universe (solar system) of Astro Knights Island is the square bounded by X-0 Y-0, X-0 Y-99, X-99 Y-99, and X-99 Y-0. All of the locations within this square can be identified by the flight control of your spaceship.
On every island you have to be the one to save whatever needs saving. That includes the kingdom in Astro Knights Island.
Once you have built a new spaceship on Astro Knights Island, it will park on top of the castle whenever you leave the island.
With Mordred
Astro Knights
it is in the left
on astro knights island