Aliens are coming to earth. Protect your castle with your thunder machine.
For activate machine, answer questions correctly.
Some aliens are wearing costumes to hide from you. Be careful!
If you can catch special aliens, you will get extra points.
You can improve your geography skills while learning national flags of the world and you will have a lot of fun!
■45 levels with 5 stages
■How to play
1. Country name will display on thunder machine.
2. Please select correct national flag of the country from 3 buttons.
3. If your answer is correct, you can attack aliens and protect your castle.
4. If you mistake the answer, you lost a star. game will finish after
lost all stars.
5. A special alien will appear in each level. If you attack these aliens, you
can get extra points.
■Unlock all levels
First 5 levels are ready to play, unlock other levels for more fun.