Using four keys to unlock boxes.
And save aliens as many as possible.
[How to play]
1. Tap a key which colour matches with bottom most box.
2. When you unlock every 10th box, you can save aliens.
3. Tap faster, and more aliens will be freed as a reward.
App icon change.
Ratings and Reviews
Simple, yet addicting. More please!
Challenge friends and check leaderboards and achievements.
With Family Sharing set up, up to six family members can use this app.