It does appear that blackberry playbook does have flash: http://blogs.blackberry.com/2011/10/...-flash-player/

That being said you should be able to play, one issue you may encounter is slow/non-responsiveness/ freezes because it is not powerful. I played on my android with around the same hardware and it did work.

You can also look at android based tablets, however the blackberry playbook should be able to work.