说明：  HTML5 canvas打砖块射击小游戏，颜色爆炸射击游戏，使用小键盘"左"和"右"箭头或"a"和"d"键移动，"空格键"发射子弹。
(HTML5 canvas brick shooting games, color explosive shooting games, using the keyboard "left" and "right" arrow or "a" and "d" keys to move, "space bar" to launch bullets.)