Added a GameOverMenu class which displays after a GameOver, showing scores and giving the player further options.

Some Sprite placements have also been changed to be ratios rather than hard coded pixels.
Moved certain components from ScoreSprite to GameOverMenu to better fit the design model.
Added a GameOverMenu class which displays after a GameOver, showing scores and giving the player further options.

Some Sprite placements have also been changed to be ratios rather than hard coded pixels.
Moved certain components from ScoreSprite to GameOverMenu to better fit the design model.