What are Ranking Rewards?

Every week, your high score will be pitted against your friends.
The high score is tabulated from Monday 00:00 am till Sunday 11:59 pm (PST/PDT).
You will receive a reward if you manage to have a good placing in the rankings.
Only the highest score obtained from any stage in the game will be recorded in the Ranking screen.
You can check your rank by tapping on the Helicarrier at the Stage selection screen.
*To unlock the Helicarrier, you will need to clear Stage 2 (not including EX missions).