class KGame{
    field Board board;

    constructor KGame new() {
        let board = Board.new();
        do board.draw();
        return this;
    }

    method void dispose() {
        do board.dispose();
        do Memory.deAlloc(this);
        return;
    }

    method void run() {
        var int key, dir;
        var boolean exit;
        let key = 0;
        let exit = false;
        while (~exit) {
            while ((key < 130) | (key > 133)) {
                let key = Keyboard.keyPressed();
            }
            let dir = key - 130;
            while (~(key = 0)) {
                let key = Keyboard.keyPressed();
            }
            do board.next(dir);
            do board.draw();
        }
        return;
    }
}