Digit Invasion

- This is your defending battle against the Digit Invaders. When the game starts, you will be given 3 lives.
- Your mission is to eliminate all Digit Invaders coming out from right to left in each level.
- You only need 2 buttons to fight with the Digit Invaders. You tap the Aim Button to aim at any of them and tap the Fire Button to eliminate it.
- When you have eliminated all of them, you can proceed to the next level. The higher the level, the faster the invaders.
- But if you cannot do it fast enough and let them appears at a full house, you will lose 1 live.
- You can regain a live when you have completed every 5 levels.
- If the sum of the eliminated digits adds up to a multiple of 10, a coloured monster carrying different points will be generated.

SCORING

- You will receive 10 points after eliminated a Digit or Monster.
- Green Monster - extra 50 points.
- Red Monster - extra 100 points.
- Yellow Monster - extra 200 points.
- Silver Alien - extra 500 points.
- If you can eliminate monsters of the same colour in a row, you can receive more EXTRA points.
- The points will be multiplied by 2 after level 100, and multiplied by 3 after level 200. The same principle applies to higher levels too.

ACHIEVEMENTS

- If you sign in Google+, there will be more than 30 achievements awaiting you to unlock and to gain XP.

LEADERBOARDS

- If you sign in Google+, you can have your scores posted and share your progress with friends.
- There are 3 leaderboards: Highest Score, Highest level, and Highest Score in one level.

REPLAY FROM HIGHEST LEVEL

- Instead of starting from level ONE, you can choose to replay the HIGHEST level that you have reached.
- However, you will be given only 1 live to start!
- No worry, you can gain more lives by passing more levels.
- Any new HIGHEST score achieved will not be recorded if the replayed level is not passed.