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.
A: Destroy this brick.
B: Place the first symbol here.
C: Place the next symbol here.
D: After the Trapper has hit the blue and yellow switches, destroy this brick.
E: Place the next symbol here.
F: Place the final symbol here, before the Trapper has reached the left end of the screen.