JS写的一个方块移动游戏

Java代码 
<script> 
            //用于判定是否是开始初始化方块 
            var mark = false; 
            var starttime, endtime, finaltime = 0;  //记录游戏时间 
            var array = new Array();  //用一个数组装所有绿色方块对象 
            var timerarr = new Array();  //记录每个绿色方块 和 对应的计时器id 
             
            function move(e){ 
                var xy = document.getElementById("xy"); 
                var self = document.getElementById("self"); 
                x = e.clientX; 
                y = e.clientY; 
                xy.value = "当前坐标："+x +","+y; 
                if(x>=454 && x<=530 &&y>=285 && y<=355 && mark==false){ 
                        mark = true; 
                        initothers(20); 
                } 
                target(e,x,y); 
            } 
             
            //线宽4px  格边长36px   target函数定位白色方块的位置 
            function target(e,x,y){ 
                 
                var self = document.getElementById("self"); 
                if(x>=12 && x<=855 && y>=40 &&y<=525 && mark ==true){ 
                    self.style.left = x +'px'; 
                    self.style.top =  y +'px'; 
                } 
            } 
            //初始化白方块位置 
            function init(){ 
                var today = new Date();