Interesting, you might want to look at the suggested code though, maybe play through with some beginners?

    function init(robot){
        robot.number = 0;
    }

    function loop(robot){
        robot.jump();
        if(robot.number++ % 2 == 0){
            robot.move(2);
        }
    }

This is in the second level.

Incrementing inside a check is awkward, as is just calling the variable 'number'. Perhaps something like

    function init(robot){
        robot.jump_next = true;
    }

    function loop(robot){
        if (robot.jump_next) {
            robot.jump()
            robot.jump_next = false;
        } else {
            robot.move(2);
            robot.jump_next = true;
        }
    }