Pinpoint, a 5x5 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
Four of the six clues show only a shape: a square, two wides and a tall. Only the wide 3 in the top-left corner is fixed at the start. Everything else comes from asking, cell by cell, which clue can still reach it, and one placement is only settled because the alternative would strand a neighbour. A good test of that habit before moving up to 6x6.