Pattern Lock, a 6x6 Patches puzzle
Arrow keys move. Enter starts a rectangle; arrows resize it; Enter places it. Escape cancels. Delete removes a patch. Control or Command Z undoes.
About this board
Six of the eight clues show only a shape, and three of those are squares, so their sizes have to be read from the space around them. The only fixed patch is a wide pair in the top-right corner. From there the 8 and the 4 settle, the squares stack down the middle, and the tall clue in the bottom-left corner is the last to fall, three rounds in.