Planning and starting the Zombie Arena game

At this point, if you haven’t already, I suggest you go and watch a video of Over 9000 Zombies (http://store.steampowered.com/app/273500/) and Crimson Land (http://store.steampowered.com/app/262830/). Our game will obviously not be as in depth or advanced as either of these examples, but we will also have the same basic set of features and game mechanics, such as the following:

• A HUD that shows details such as the score, high score, bullets in the clip, the number of bullets left, player health, and the number of zombies left to kill.
• The player will shoot zombies while frantically running away from them.
• Move around a scrolling world using the WASD keyboard keys while aiming the gun using the mouse.
• In between each level, the player will choose a “level-up” that will affect the way the game needs to be played for the player to win.
• The player will need to collect “pick-ups&...