If you have five spare minutes, 8192 Tight will fill them. Everything happens on one screen with a 4×4 board where the target tile is 8192, and the whole thing runs straight in the browser - no downloads, no sign-ups, no fuss.
The strategy sits in corner play: pick one corner, keep your biggest tile parked there, and never swipe it into the middle of traffic. With a 4×4 board where the target tile is 8192, the margin for error changes - more room means longer games, less room means every swipes counts twice.
The loop is deliberately compact: one round takes minutes, improvement is visible, and the next run is one tap away. That makes it a reliable filler for short breaks - and an easy game to recommend to someone who 'does not really play games'.