Bug#757621: Octocat Ball is non-free (trademark)

[Calinou]

Package: neverball
Version: 1.6.0-2
Severity: serious

The game includes several balls, which the player can choose from (the 
difference is purely cosmetic, nothing gameplay-related is involved). 
However, 1.6.0 includes a problematic one, the Octocat Ball which is 
likely non-free, since it's a registered trademark of GitHub, Inc 
<https://octodex.github.com/faq.html>.

I guess “censoring” (by removing the ball or adding a placeholder 
instead) will work in order to fix that.