Refactor Code

Created HUD Class and refactor the Game.js code
Refactor Code

Refactor the Game.js code even more via the HUD.js Class
Code cleaning

Some code cleaning and consistency
Added Destroyers + Submarines

Added Destroyer.js Class and Submarines.js Class into the game. Updated
Game.js and Preloader.js for relatives codes.
Attempted Player.js Classes [FAILED]

Attempted to create a Player.js Class and refactor the whole game to
fit the new code architecture… FAILED need to Roll Back
Revert 83bbd6a..321f61b

This rolls back to commit 83bbd6a208228c3272f79c95e5963110561d595d.
Bug Fixe

Fixed a bug in Game.js / HUD.js Classes - Where HUD tried to destroy()
something that was not yet created.
Added stages

Added stages handling + Made some game improvements ( PowerUp2 speedup,
enemies timing, loot … )
Modyfied README
Added Scoreboard

Added a endStage ScoreBoard. Some bug fixes. Updated the README.md file.
Typo
Merge pull request #1 from VincentBourdeau/test-branch

First Commit