Gridflip is a simple puzzle game where the goal is to flip the entire grid from white to black. Contains 3 different game modes.

Rules:

Standard Grids: Touching a square flips it and all adjacent squares to the opposite colour.
Line Flip Grids: Touching a square flips it and all the other squares vertically and horizontally in line with it to the opposite colour.
Three Colour Grids: The same rules as the standard grid, except now there's a third colour between white and black.

(Please note: Itch.io has a problem running embedded twine/sugarcube games in the firefox browser, but the download should work, or you can play it here instead.)