Instructions: ➥ left / right arrow to move the tetromino (tetris piece) ➥ up arrow to rotate the tetromino ➥ if a line is full, it disappears and your score increases ➥ down arrow to move the tetromino down ➥ space to drop the tetromino More info: https://en.wikipedia.org/wiki/Tetris#Gameplay
original credit: @TimMcCool
