Flood Fill
Play Flood Fill free online. Change the colour of your patch to swallow neighbouring squares and flood the whole board in one colour before your moves run out.
How to Play Flood Fill
The board is a grid of squares in six colours. Your patch starts as the single square in the top-left corner. Each move, pick a colour: your whole patch changes to that colour, and every touching square of the same colour joins it.
Keep picking colours and your patch spreads across the board like a flood. The goal is to turn the entire board into one colour before you run out of moves. The move limit is shown at the top.
Every square your patch swallows is worth a point. Flooding the whole board scores 200 points plus 50 for every move you have left over, and half of those spare moves carry over to the next board as extra moves.
The boards get bigger as you go, from 10 squares across up to 14, and the move limits get tighter. If you run out of moves before the board is one colour, the game is over.
Controls
Touch
- Tap one of the six colour buttons under the board, or tap any square on the board to pick its colour.
Mouse
- Click a colour button or any square.
Keyboard
- Keys 1 to 6 pick the six colours in the order shown under the board. P or Escape pauses, M mutes.
Tips and Tricks
- Grow toward the middle of the board first. The more edge your patch has, the more squares each move can reach.
- Look one move ahead. A colour that takes only a few squares now can open up a big group behind them.
- Every colour has its own shape too, which helps if some colours are hard to tell apart.
- Near the end, clear out small leftover pockets before they cost you a move each.
About the Game
Flood Fill is a quick strategy puzzle based on a classic colour-flooding game. Each board takes only a minute, but finishing with spare moves takes planning.
The look is bold and playful, with bright 80s colours and shapes on a cream background, and each colour has a matching shape so the game works for colour-blind players. Your best score is kept in this browser and can go on the Top 10 board.
Flood Fill FAQ
How many moves do I get?
Each board has its own limit, worked out from a good solution plus a little slack, plus any spare moves carried over from the last board.
Can I play Flood Fill if I am colour-blind?
Yes. Every colour also has its own shape, such as a circle, triangle or cross, so you can play by shape alone.
Do spare moves carry over?
Half of them do. The rest are turned into points when you finish the board.
How big do the boards get?
They start at 10 by 10 squares and grow to 14 by 14.
