*Added background image to Game scene and key board controls of the player

[dilanHewawitharana]

Hi All

I choose the following git repository and made some changes. Since i could not found any issued related to that repository, I added my own changes that will require for game.

Since i have good experience with Cocos creator environment, i tried to find Cocos related project. Since i could not find Cocos retarded repository, i choose this repository. Previously i don't have any experience with Phaser CE game engine,i had to learn it newly in order to do this task.

Chosen repository -> Wizcorp/wizard-academy-spaceshooter

changes are follows :
* Added background image to Game scene
* Added key functions for move player
- go Up ( W key)
- go Down (S key)
- go Left (A key)
- go Right (D key)
- go Up Right ( W + D keys)
- go Up Left ( W + A Keys)
- go Down Right (S + D keys)
- go Down left (A + S Keys)
* added key board function to change direction of player( Left or Right)
- turn Left (Q Keys)
- turn right (E Keys)

I committed the code and i attached a video and the zip files of the project for your reference.

Here are the URL to download the video and the source file : https://drive.google.com/file/d/1HHn4YjF28JuPyKG1sUgKug_YQOhGkdUx/view?usp=sharing

Thank you
Dilan Sarith Hewawitharana