写一段超级玛丽游戏代码

// Super Mario Game Code var player = { name: "Mario", x: 0, // player's current x coordinate y: 0, // player's current y coordinate speedX: 1, // horizontal speed of the player speedY: 1, // vertical speed of the player moveRight: function(){ // function to move right this.x += this.speedX; }, moveLeft: function(){ // function to move left this.x -= this.speedX; }, jumpUp: function(){ //function to jump up this.y -= this.speedY; }, fallDown : function(){ //function to fall down this.y += this.speedY; } };