One idea for you is to use the new in app purchase
Release the game for free with 4 quests.
The let the users that want more buy each new quest for 3-6 skr.
This way can you add quests and get new cash flow during a longer time of the games lifetime.
And maybe a gold edition where the user pays 30-40 skr and get the full game and new quests free.
Only some ideas
This way so do also users that are intrested being able to download the free version and maybe buy the gold edition instead when they get hooked
Android 2.3 , ZTE Skate , 480x800 , 800 mhz , Samsung Galaxy Y , 240x320 , 832 mhz , Sony ericson arc 480x854 , 1 ghz
Android 4.0 , Dmtech 3g 9738B , 1024x768 , 9.7 inches , 1.2 ghz