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.
2-2: Grand hall
A: Get the symbol and this coin.
B: Place the symbol here. Fall down and enter the teleporter.
C: Get the dot symbol and place it here. Get the last coins.