Click squares to solve the puzzle! Maybe that wasn't descriptive enough, when clicking a square that square and the four touching it will invert their state (states can be black or white), example: if you click a white square with four blacks surrounding it the square will turn black and the four surrounding will turn white. The goal is to make all the squares white! (if you're having a hard time seeing where the squares start and end you can toggle hitboxes with the space key or clicking the "toggle hitboxes" button)
This is a real puzzle called the shroud puzzle, usually in 5x5 form but I made it a little more challenging... speaking of challenging, this puzzle is really hard, like really really hard and you might need to be ready for a ragequit. I should also mention that the puzzle is randomized but it will always have a solution, although that solution might vary between different puzzles. Please report any problems to me in the comments or on my profile!