Make a player that shoots brofists~
I'm afraid Suikama already got that one covered, too. In the same player script, even. :V
On topic, I'd be glad to contribute to the coding, but I think there are other people here who are better than me at that.
Graphics, well... I have nothing to offer but awful paint jobs.
Sound effects are not that hard to find on the web if you know what to look for, though you probably won't find exactly the sound you're looking for. In that case combining different sound effects may yield better results.
The thing with creating player scripts is that they are just very unrewarding scripts to make.
As was already stated, the most of the work is to get good looking graphics, not the coding. Compare that to spellcard or even boss scripts, where some well thought out danmaku will let you get away with using no other graphics at all.
Then compare playing the same boss battle with different characters to playing different boss battles with the same character. What is usually more fun?
I think I've made my point.