Just received a reply from my email I sent to vector unit support earlier. I asked if they would consider porting Riptide and Shinerunner to the playbook. Here's there response.
"Thanks for your email! As a matter of fact we are considering porting one or both of our games to the Playbook. Mostly we are just waiting for some free development time to do it. But I would expect that it'll happen sometime later this summer."
Hope it happens cause the video of Riptide looks greaaat!