Diego Dotta

It's 2048, but the tiles are birds... and they sing. Slide two of the same bird together and they merge into the next, rarer one up the ladder… and you hear it: a real recording of that bird's call. A little Spotted Pardalote becomes a Ruby-crowned Kinglet becomes a Splendid Fairywren… all the way up to a Hoopoe (that's your 2048), and if you're good, a Kea and a Superb Lyrebird.

BirDJ turns real birdsong into a beat machine. Tap a grid of birds to fire their calls, or play them on your keyboard. Hold to sustain, drag up or down to bend the pitch. Hit record, play your beat, and share it as a link that replays right in a friend's browser. No app, no signup, no server. Open the demos to hear Ode to Joy, Seven Nation Army, and more, played entirely by birds. Free, from The Sunrise.

Tetris meets QWERTY. It's Tetris, except the blocks are keys and every single one has exactly one home. Drop the A on the A. The Z on the Z. You get it. Miss the spot, and that key turns into a useless gray brick that just sits there, bothering you until you explode it. This is game is sponsored by Smart Keys App. Stack them right and the keyboard lights up blue, row by row, until the whole thing is whole again. Stack them wrong long enough and the junk piles to the top and it's over.