Increased contrast on sprites to try to increase visibility.
Filled rocks with black.
Reduced 12 objects in game to 5.
Bullet is destroyed when collinding with rock.
Enemy ship now collides with rocks.
Objects placement now only on borders @ the start of the game.
Player spaceship now collides with enemy space ship.
EnemyBullet range shorten.
Misc improvements.
Main menu screen improved.