WHAT TO DO

You must find all Atoms! The Atoms are hidden in the grey field.

You can fire beams that might tell you the location of the Atoms.

You do that by clicking on side cells (the lighter grey ones).

A beam turns before it hits an Atom.
If you fire a beam from below and there is an Atom on the left somewhere, the beam will turn to the right:

When the beam reaches another side cell, both cells are colored!

If it hits an atom its absorbed:

The side cell (where the beam came from) is then GREY!

It's also possible that a beam makes a U-turn and gets right back where it came from.

Either it doesnt get the chance to enter the field (there's an atom right or left of where the beam enters)

or it must make a U-turn:

The side cell is then WHITE!