Decide on graphics style, if possible

[KaiaSky]

The LD graphics were good, but they didn't have a unified style, which was annoying. (To be specific, Earth Dude was made in a very pixel-art fashion, with #000000 outlines around them. Air Dude, however, had transparent objects everywhere, was generally softer, etc. We should try to make the art somewhat stylistically consistent. That starts with deciding what style to make them all in.