Step 1: Build red tower using 5 squares, 4 tall triangles and 3 hollow squares.

Step 2: Build orange tower using 9 squares, 4 tall triangles, 2 hollow squares and 1 two pane window.

Step 3: Build yellow tower using 13 squares, 4 tall triangles and 3 hollow squares. Also create bridge element with 2 triangles, 1 square and 1 rectangle.

Step 4: Green tower assembly. Use 11 squares and 1 two pane window as first floor.

Step 5: Build hexagon which will be the green tower second floor. Use 5 squares and 6 triangles.

Step 6: Complete green tower top with 3 squares, 1 hollow square and 4 castle battlements.

Step 7: Build blue tower using 13 squares, 4 tall triangles and 3 hollow squares. Also create bridge element with 2 triangles, 1 square and 1 rectangle.

Step 8: Build cyan tower using 9 squares, 4 tall triangles, 2 hollow squares and 1 two pane window.

Step 9: Build pink tower using 5 squares, 4 tall triangles and 3 hollow squares.

Step 10: Complete castle yard with 8 squares, 2 triangles, 12 rectangles.

Done!