BirdDuko

Tap a square oce to cross it out. Tap a crossed square agai to place a bird. Tap a bird to remove it. Drag across squares to cross out several at oce. Rules: oe bird per colour patch, oe per row ad colum, ad birds may ot touch, eve diagoally. A wrog bird costs a heart; lose all 3 ad the level restarts. Use Hit to reveal a bird ad Udo to step back.

Every colour patch hides one bird. Work out where they're sitting! Birddoku is a calm logic puzzle: place one bird in each colour, never two in the same row or column, and never two touching, not even corner to corner. Boards start at a gentle 4x4 and grow to 9x9, with new levels that keep coming.