Urgently needs an overhaul
I suppose we should be grateful for the small mercies in having a decent amount of sounds in the flash. That was about the only endearing quality.
What we need to start with is the basics - get the sprite sheet for the godzilla you chose and manipulate it (Use some tutorials on NG to find out more) to give you the moves you want, rather than using a poorly applied paintbrush to extend the arms in a lazy fashion.
I do quite like the effort you added with the addition of Godzilla's face, because it indicates that you're willing to at least make some effort, so all is not lost. Maybe get a mottled effect for the colour, so it looks the same as the sprites.
A better plot line would help and in the end, searching the internet will give you access to better sounds, rather than the depressing splat that ended the whole thing.
[Review Request Club]