That's a good question. I'll ask and get back to you.
The beauty of it is that Disney doesn't have to care; the voting public does. Pushing this with Disney will accomplish nothing. Disney is in business to make a profit, and their business model is profitable.
We need to start fighting this stuff at the local and state level, in our political primaries. I'm not sure where the Libertarians and the Greens stand on this, but I do know that on the national level, the copyright situation isn't Republicans versus Democrats; it's legislators and media lobbyists versus the public. The only way to fix this is to a) vote third party, or b) go to our party primaries and vote for people who have a populist focus when it comes to copyright issues. (Note: OGA has no opinion about which political party you should vote for.)
This isn't a fight that can be won in a day. It probably can't even be won in a decade. But we can either give up and go home, or keep pushing out awareness of the issue and hopefully affect some change some time down the line.
Of course it did. As you said, Disney has been raiding the public domain forever now. I'm just saying that if they raided the modern public domain, it would put it into a context that might grab a bit more attention so we could start talking about copyright overreach.
I suppose I'm going to have to put out some sort of official OGA position on this, which, not being a lawyer, I really hate to do. We have to take copyright law very seriously, because people need to be able to use the media here without fear of legal repercussions. So, to start off with, I'm going to say that officially OGA will not worry about copyrights on color palettes.
My reasoning is as follows:
In summary, there's always some vanishingly small but nonzero probability that someone might sue you over any content that you use. At some point you need to draw the line.
One other note: Pantone has been known for posturing about copyrighting their color collection, but copyright law explicitly excludes databases and compilations. While it would seem to me that they don't have a leg to stand on, they do have a huge pile of money to stand on and have issued cease & desist letters for use of their color database. It's not worth the hassle and risk to fight them over it, so we will treat the Pantone palette as if they have a valid copyright, even though it's extremely doubtful that they do.
With regard to Disney raiding the public domain, I say great, let them do it. Not becauase I particularly like Disney, but rather because they're primarily responsible for the fact that copyright keeps getting extended indefinitely. If they start raiding the current public domain, that's another talking point for returning copyright law to a reasonable length of time. (Sure, most of their stories come from raiding the public domain as it is, but that's old stuff. It would be another matter entirely if any of the authors were still around to discuss their views on Disney's hypocricy with respect to copyright.)
I know I'm blathering a lot here...
You might want to reformat your original post so that it's not a clickable link, that way google doesn't give them even more hits. I think removing the http will work.
For anyone looking at the preview, it's not obvious how extensive this set is until you view the download PNG. It's 100+ unique pieces, done in 12 different materials.
I just found a video of this game on youtube and I left a comment, hoping that the author of the video is the author of the game.
I don't think there's a whole lot that can be done about them lifting your title. :(
I think the problem is a lack of textures?
Is there somewhere I could download your game to try it out?