Play on the ends - Play cards on the ends of the row, with at least as many cards as the stack next to it. Reload your hand - Can't play? Pass to take any card from the row. Then plot your comeback! Get out! The game ends immediately when the first player empties their hand.

Snappy and tense!
I'm out is about empyting your hand before anyone else. Everyone plays cards into a central row that goes in ascending order, playing onto the low or high end.
When you don't want to - or can't play - you take any card from the row to add to your hand, and sit out until other players have done the same.
Playing most of your hand will be easy. But going out? Playing those last few cards will take some advanced planning and skillful play.