Stained Glass — free browser game

Stained Glass is a puzzle where you stack three primary glass layers (Red, Green, Blue) to reproduce a target stained-glass pattern. The small "Target" panel shows the pattern to copy; the big 4×4 grid in the middle is your working glass. Pick a colour from the palette and click a cell — that colour's layer is added to the cell. Colours combine additively (light): Red + Green = Yellow, Red + Blue = Magenta, Green + Blue = Cyan, all three = White. Clicking with a colour the cell already has does nothing and doesn't waste a move, so accidental double-clicks aren't punished. To wipe a cell, pick the "Erase" (X) tool and click the cell. The puzzle is solved the moment every cell matches the target; your move count is the score, and a lower count beats your record. Use 1/2/3 for the colours, 0 or X for the eraser, and R for a fresh pattern. Tip: look at the mixed colours in the target first — a yellow cell takes red + green (two moves), so plan a single sweep per colour (apply all reds, then all greens, then all blues) to minimise palette switches.