Falldown v1.6

Changelog

• New font
• Antialiased texts
• Refined UI
• Refined pause menu
• Refined options menu
• More options:
  • Switch on/off music
  • Switch on/off effects
  • Increase/decrease volume of music
  • Increase/decrease volume of effects
• Indicator in options menu whether the option is currently switched on/off
• General bug fixing, cleaning up and refactoring