Double Stitch, 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
Half the clues give no number. The small ones near the middle are the anchors: the tall 2, the wide pair on the left and the 3 beside it are fixed from the start, and a 6 runs the whole bottom row. Above them, two shape-only clues turn out to be big: a wide one that covers most of the top two rows, and a tall one down the right edge that is settled because anything else would strand a neighbour.