I know I am super late to the party but hearing how you just took it upon yourself to finish the game is Awesome in the literal meaning of that word! Sadly I can't really help out a lot with my lack of drawing or coding skills,only thing there is for me to do is to point out that on the Steam Greenlight page for BILY there is a one(year old) comment of a artist saying they love to be involved. You may already saw it,but in case you didn't
BILY greenlight page:
https://steamcommunity.com/sharedfiles/filedetails/?id=306442773
Portfolio of Jes Udelle (Puddle):
http://itpuddle.com/splash
But last question. Do you have a blog or something for this? It would be amazing to build a small community that wants to actually finish making this "dead" project!