Added a lot of new things :
Made changes to asteroid.png
Removed block.png
Removed player.png
Removed Block.hx
Renamed Enemy.hx into Asteroid.hx
Made changes for to Explosion.hx
Added toggle for shooting
Added borders to game
Added explosionvolume to Explosion.hx for volume control
Added new text HUD to GameScene.hx
Added EndScene.hx
Added Planet.hx for future backgrounds
Added Score.hx for better score control

Signed-off-by: Bram van der Veen <96aa48@gmail.com>