Read the picture as shapes
A complicated blueprint becomes easier when you stop treating it as dozens of separate squares. First find the outline, then identify repeated rows, mirrored sides and solid blocks of one color.
On mobile, keep the reference above the working board and compare one zone at a time. Complete the top, middle and bottom as separate mini-puzzles instead of constantly searching the entire image.
Paint by color, then repair
Choose the color covering the largest area and draw its continuous sections with one drag. Continue from the most common color to the rarest. This reduces trips to the palette and preserves valuable seconds.
Save the eraser for a final correction pass. A wrong block reduces accuracy, but repeatedly correcting while drawing breaks your rhythm. Finish the structure first, compare it with the reference, and repair only visible mistakes.
Surviving the larger levels
From the 9×9 grids onward, perfect copying may be slower than reaching the 85 percent pass threshold. Prioritize the unmistakable outline and large color regions before tiny decorative pixels.
Drag steadily through the center of each cell. Fast diagonal movements can skip squares, especially on a small screen. A controlled horizontal or vertical stroke is usually faster than returning to fill missed gaps.