Version 2.10

Added : Define sound : Add music and sound fx to your game. 
Added : Testing screen by typing 'testing(yes)' in define init. 
Added : Player flashes (can't be hit) when new life starts 'flashtime(x)'
Added : Invincibility option : press 'i' when debugging active.
Added : Player can now duck.
Added : optional duck key now can be added to keys statement. ie. keys(lt,rt,ju,du).
Added : titlescreen(image) in define init : Allows is title screen.
Added : duckwhilejump(yes/no) in define init.
Added : Can trigger level change when items are collected : allitems(yes).
Added : PGG restarts when Game Over.
Fixed : Lives display doesn't show -1.
Fixed : More helpful error messages.