In javaScript, we can Build a Simple game Program. what is the program like? Let's see <!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width, initial-scale=1.0"/> <style> canvas { border:1px solid #d3d3d3; background-color: #f1f1f1; } </style> </head> <body onload="startGame()"> <script> var myGamePiece; var myObstacles = []; var myScore; function startGame() { myGamePiece = new component(30, 30, "red", 10, 120); myGamePiece.gravity = 0.05; myScore = new component("30px", "Consolas", "black", 280, 40, "text"); myGameArea.start(); } var myGameArea = { canvas : document.createElement("canvas"), start : function() { this.canvas.width = 480; ...