4S4F'JO: the grid card game where the lowest score wins

A memory and bluffing game: everyone has a grid of 12 face-down cards. Draw, swap, flip… and hope you don't end up with a 12.

Goal of the game

Have the lowest total when the game ends (as soon as a player reaches 100 points).

Everyone has 12 hidden cards in a grid (4 columns of 3). At the start, flip 2 of them.
On your turn: draw a card, or take the top card of the discard pile.
Put it in place of one of your cards, which goes to the discard pile. You can also throw away a drawn card: then flip one of your hidden cards.
3 identical visible cards in one column? The column disappears.
When someone has flipped everything, the others play one last turn. If that player doesn't have the lowest score, their points are doubled.
Cards go from -2 to 12. When a player reaches 100 points, the lowest total wins.

Watch the discard pile: it tells you what the others are looking for.
Don't flip everything too fast if your score isn't the lowest: your points would be doubled.