Castle of Elite - Official game guide|
Introduction - Basics - Solutions - Secrets - Trivia
When the guide tells you to place a brick symbol on a certain square, it means you should aim the mouse cursor on that square.
3-3: The tiny puzzle
A: Get this symbol and place it on B.
C: Get this symbol and place it on D.
E: Get this symbol and place it on F. Destroy the brick on F. Hit the green switch above the starting point. You can now reach all the coins and the goal.