A quick note before you play
Drop discs into seven columns. Connect four before your opponent does, on the same device. Start when you are ready. You can restart at any time, and keyboard controls work after you select the game area. On touch screens, use the on-screen controls or tap the board. No score is uploaded, and there is no account to create.
Build a threat from the bottom
Discs fall into the lowest free position in a column. You cannot place a disc in midair. The center column participates in more potential lines, but a playable three-disc threat needs immediate attention wherever it appears.
Two people, one board
Coral moves first and Teal follows. The status names the next player, and the discs also use A and B marks so color is not the only cue. A full column rejects another drop. A full board with no line of four is a draw. This version uses local turns and has no computer or online opponent.
Make your own version
This game is also a free template demonstrating gravity-based placement, alternating turns, and directional win scans. Download its source to explore the logic, change the visuals, and experiment with a new rule.