Add functionality to existing HTML/CSS/JavaScript Code

This is a basic educational game, a math-based game in a Space Invaders style format based on this tutorial ([login to view URL]). Time to complete 6 hours. A math question (quiz) is asked, the screen changes to a row of answers the user must shoot the correct answer. The basic game shell has been created in Google Web Designer using the [login to view URL] library. This code (HTML, CSS, JS) will be provided. This includes player movement, enemy movement (you will change this to math answers) and scoreboard (change to stars score eg: * x 5). You must comment the code you contribute. An example screen is attached. You will be tasked to add the following to the game: A math question is asked, the screen changes to a row of 3 answers the user must shoot the correct answer. The math question must be shown until the correct answer is shot. This game is based on under 10-year old players, so the game should generate simple math problems. For example: First round: 1 + 2, 4 + 5, 7 - 2 Second round: 5 - 8, 8 + 6, 4 + 10 Third round: 2 * 3, 1 * 4, 3 * 2 Each round should have 10 questions. A scoreboard is updated, points are in stars. A high scores scoreboard is shown when the game quits or user has completed the game (retain a list of high scores in a JSON file or etc). Maximum width of 800px for the game. Time to complete 4 hours. Your deliverable must work correctly in Google Web Designer.