Cool thread.

On the issue of art: y'all could just do the art yallselves, as you're doing, and just pay a freelance artist to redraw it as a singular spruced up image. The art design would still be the same, since y'all are the ones saying "hey this here, this here, looks like this, etc.," but would be "cleaned up" in the process of being redrawn and would be artwork owned by y'all.

It's cost litigation more to issue a cease and desist order than anyone could claim "damages" for by a single home few game, if there was even a case to begin with. That said, there's no case; "Camelot themed pinball game" is far too generic to face any copyright issues.

I like it. What's your estimated time and money invested into it thus far, out of curiosity?

She have a deviantart?

Looks great! Kids doing a great job!

Question: Are y'all adding any general illumination to it other than the LED inserts already present?

Ah, cool! Well, you know, if you already have the artist and whatnot, and you end up doing two versions so each has one, what you could do is have two different backglasses with the knight being each kid.