The starite is above you and you can't dig to it. You will either have to guide it to Maxwell or get Maxwell out of the small space somehow.

1. Create a MICROSCOPIC HELICOPTER and have Maxwell ride in it to the Starite.
2. Create a TINY SPACESHIP and have Maxwell ride to the starite in it.
3. Create a MINISCULE UFO and have Maxwell ride to the starite in it. (The game has that misspelling built-in. It's supposed to be MINUSCULE.)