Thanks! Yes, we are using the Sparrow framework.
Mostly for the rendering hierarchy, the juggler, texture atlases and particles (partly).
We wouldn't have been able to create this game without the Sparrow framework. It's a great game engine to start with!
We started our game in Flash, then switched to Starling and afterwards ported to Sparrow. We added additional libraries for more functionalities, Libraries like FMOD, Scaleform and Fork particles.
If you are fan of strategic games and you have an iPad with a retina screen, consider a pledge so you can follow up on our game.
Thanks again for creating Sparrow!
Jonas