It’s fair to say that Angry Birds Star Wars has lived up to expectations so far, storming its way to the top of the App Store paid chart in less than four hours. Now Rovio has added 20 new free levels as the game moves into The Empire Strikes Back Territory.

The 20 new levels take place on the remote ice world of Hoth, mirroring the opening scenes of the second Star Wars film (aka Episode V) and including the AT-AT vehicles that featured so prominently there. The new levels also mark the first appearance of the Pink Bird as Princess Leia.

Rovio promised that there are more updates to come. “This is just the beginning of the story from Episode V, to stay tuned for more adventures coming up,” it said.

The new levels are initially available on iOS, with Android, Mac and PC coming soon and other platforms – such as Windows Phone – to follow.