Two huge franchises collide, with the result being the Angry Birds Star Wars game, which is now available to download.Of course, it can't fail. Anyone with an addiction to Angry Birds will love it, while Star Wars completists will feel equally compelled to click the 'buy' button. A quick glance tells us that the game already tops the app charts and is likely to do so for some time yet.According to Rovio, this is the premise: 'Rebel birds, striking from a hidden base, have won their first victory against the evil Imperial Pigs. During the battle, Rebel spies managed to steal secret plans to the Empire’s ultimate weapon, the PIG STAR, and are racing to deliver the plans to the Rebel Birds. Now they need your help!'You can help by wielding your lightsaber, blaster and Jedi power to blast away Pigtroopers, battling your way through levels (80 in total) until you hit the Pig Star and face Darth Vader, Dark Lord of the Pigs. Bonus levels too, featuring R2-D2 and C-3PO, with assistance from the Mighty Falcon available should things get too tricky and training levels too, although you do have to pay for the latter two features on top of the cost of the app.Talking of price, the initial app is actually free for Android users, but iPhone owners will have to pay 69p, iPad users are charged a hefty £1.99 and if you have a Windows Phone 8 smartphone, the force can be with you for 79p.