Yeah, fact is I just set up my own repo to collect stuff that have been worked on to keep them separate from what's just ideas. The license for that may even be a third variety. It's hard to grasp the differences and legal implications between similar looking free licenses, but I know the MIT license is used widely.
https://github.com/Gapstare/zauberer-snakecharmer
Using placeholder resources from other projects is a good idea, but I'm a bit clueless as how to make that happen. At the moment I have resumed work on explosion sprites for the flechette.