1.5 - Updates/Bugfix/Enhancements

A few updates to the game.  It's been a while!

• Updated engine to latest version. (DragonRuby v3.17)
• Level progress is now saved in web games. (This can be reset if you want to go back with the "Reset Progress" button)
• New background image.
• Readability improvements for the How-to instructions.
• Bugfix to add "spark" effect back in game. (inadvertently removed in 1.4)