7squared is a simple game based on a 7x7 grid. It's meant for two players, black and blue, who take turns. You can move by clicking on a cell adjacent to any of your own colour. You can win by clicking on an adjacent cell that is your enemy's colour, so you shouldn't move into vulnerable positions.
A friend and I invented the game on paper, and it's simple to play and set up with any two colours of pen. The ultimate time killer in free periods at school!
You can play it at https://7squared.vercel.app/