[Feature #3] When on game over screen, any key pressed opens the menu.
[Feature #3] Resume button removed from game over screen.
[Feature #3] Pad controller now also opens game over menu on any key.
[Feature #3] Fix: Start does not close the game over menu, and shop music is not played on this menu
Merge branch 'feature/3-game-over-menu' into develop
Merge remote-tracking branch 'origin/develop' into develop