All animations progress horizontally, left to right. So the first frame is the leftmost frame and onwards to the right.
@Ryan: (and, not to toot my own horn, there are also updated enemy graphics here: http://opengameart.org/content/heroine-dusk-first-person-dungeon-crawl-e...)
Hey, nice work! I really appreciate you taking the time to expand on this set, especially with the jam coming up.
You're going to need to be a lot more specific about what you need to get an artist interested. I'm a geology major getting ready to graduate this May so I obviously have a lot of interest in the subject matter, but I would have no idea whether the type of art I do (pixel art) would be of any use to your project (a moot point in my case since I don't have the time either way, but you get the point). "Good art" is incredibly vague, as is "able to make frames." Since you can't compensate the artist you'll need to compensate by making it as easy and smooth as possible for an artist to contribute. An artist might do some drawing for an educational game for kicks, but that's because arting is fun. The logistics of determining formatting, resolution and other such details is generally less fun, so it would behoove you to take care of that stuff yourself.
You really need to give a good idea of the scope of the project too. If it's a few quick things you're a lot more likely to have luck than if it's a huge chunk of work that's going to take a whole lot of someone's time.
Another thing you should probably mention is the licensing status of the game. If it's going to be an open-source resource that allows teaching the earth sciences in general to be easier it may be more appealing than if it's going to be restricted to one site.
It's also odd that you can't put up images of the game, though it's good that you mention it. Being able to do that would likely help a lot, at the very least in establishing answers to some of the above questions.
Anyway, good luck--for obvious reasons I hope you're successful in this.
I think that they're all edited from other fighting game sprites.
What William said. definitely not a bug on the shoes layer which will be fixed soon.
For the record, I've been curating a few collections sort of in preparation for this. I have archive-complete collections of 2D platformer and isometric assets. That may be useful for more specific categorization or tagging.
As always, great work!