🏗️Final project: the complete Tetris

Final assembly: the game logic (tick + keyboard) inside a real page with header, canvas and footer. All the validated bricks are provided — the mechanics are yours!

The tick is gravity: the piece drops one cell; if it's blocked, it locks (merge), full lines clear (the score climbs by as much) and a new piece spawns. Finish and earn the Season 3 legend badge! 👑

function tick() {
  var test = {x: piece.x, y: piece.y + 1, shape: piece.shape};
  if (collides(grid, test)) {
    // merge, score, new piece
  } else {
    piece.y = piece.y + 1;
  }
}