Most of these have (and will continue to have, for some time ( Edit: No, they will not)) these 'borrowed' assets. Here's the concern though: I decided that I'd like to start tweeting about this project with links to the YouTube dev logs (which are currently unlisted) I've been making.

I assume that this is common practice and not a big deal on its own. It will absolutely be replaced once we get to the point where we're ready to create our own, but for early playtesting, it's important to have something vaguely similar to what we'll end up with in there for now. My WIP game is currently using a (very poorly-tiled) space-y image that I ripped from Google images. I have a question that I think I know the answer to, but just in case, I'd like to hear some feedback.

I was feeling anxious and obligated to reply to folks who only read the first post here and weren't up to speed on my situation, so now everyone who pops in will know what's up. Shortly after, I (somewhat amusingly) discovered that the image is public domain after all, but the point still stands.

Knowing this, I promptly removed the image that was in my project. Edit: The community has made it crystal clear that using assets without permission, even for private use, is not acceptable.