This game was fun when it first came out but now it is so different from what it originally was with completing goals to unlock levels that it feels more like a test platform for the developer to see how implementing those methods into the rest of their games would be like. I stopped playing ABS hoping for the day when they remove the limitations and restrictions. If you want to add new birds or new levels thats fine. If you want to play with the game physics thats cool too but changing the level progression mechanics completely ruined the game.
Mil Doc Jr about Angry Birds Space