Click and drag to move the pieces. Press left and right to rotate the L pieces. Press F to flip the L pieces. In the L game, you move L pieces and neutral pieces on a grid. Player 1 moves the red L piece while player moves the blue one. Player 1 starts by moving their piece anyway they want. The L piece cannot be placed on a neutral piece, on the other L piece or outside the game area. After that, they can either move any neutral piece or skip doing so. The game ends when a player cannot move their L piece.
The L game was created by Edward de Bono, which was presented in his book "The Five-Day Course in Thinking" (1967). I did all of the proggraming.