Flip all the tiles in the grid to clear them up, before the time runs out, in this nice little puzzle game....

Game Instructions:

The aim of this interesting puzzle game is to try and flip all of the tiles in the grid before the time runs out. You'll earn a time bonus if you manage to flip 100% of the tiles. You can clear 75% of the tiles before the time runs out to make it to the next level. Move your Mouse Pointer over the tiles to flip them. It means that if you place the mouse pointer over a visible tile then it will become invisible, and vice versa. Try to make the maximum number of tiles invisible to score the maximum points. Some tiles require two flips to make them disappear.