clearer colors + image export

Hi all!

I noticed that this quick little tool I made a year ago is still getting use, so I made a small update.

1) The background parchment asset has been lightened for readability

2) I added a rudimentary image export button- still too blurry for my liking, but it's a start.

Future plans include maybe adding a text color changer, a background color changer, and possibly a font changer.

Thanks for reading!