Here's what happened with the Unicorn Dash game in case anyone's interested:
The Android Apps That Are Sparking Legal Battles - Yahoo! Finance
This is the part you should find interesting:
: The network demanded a takedown
of Unicorn Dash
on copyright grounds, an app it found too similar to the network’s own online game, Robot Unicorn Attack
. The app was taken down"
Personally, I'm rather pissed off that they would pull a copy-cat app from the marketplace of a platform, which they themselves have said they have no desire to publish for whatsoever.