About game

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 mathematical skills and you will have a lot of fun!

45 levels with 4 operations

Addition. subtraction, multiplication, division and mixed levels.

How to play

1. Question and three answers will display on thunder machine.
2. Please select correct answer 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.

Game center support:

You can compare your score with others in the world.

Unlock all levels

First 5 levels are ready to play, unlock other levels for more fun.