How it all began

The greatest minds of all mankind are threatened by giants meteorites containing mathematical operations. To save these thinkers, 4 protective shields were set and a protonic cannon was built to shoot the meteorites. If the meteorites destroy the shields our awesome intellectuals, to whom we owe so much, could be lost forever...

How does the protonic cannon work

In order to destroy meteorites you have to type in the result of the operations contained in them, and then press space bar. If the result isn't correct, the cannon won't shoot. Beware the falling of red meteorites: they fall twice as fast and when they hit a shield they will destroy it completely. On the other hand, if you'll manage to shoot to them, they will repair or recreate one shield.

Special thanks

The game basic idea was taken from the application Tux of Math. This program, that I'd probably never found without the hint of Mathmum of base5Forum, is very funny and open source. I invite you to download it and spread it. A big thank to Pietro who checked my English translation!

Settings and other precautions

It's not possible to delete digitized numbers. Therefore, if you realize you did a mistake, press space bar and then re digitize the number.

Below you find the game options. You can choose which operators you want to fight (+ means only sum, so operations as "3+4" and "7+1", +- means sum and subtraction, so "2+1" but also "3-7" and so on...) and the maximum value of operands (with maximum value 3, for instance, you will have only 0, 1, 2, 3 digit combined with the chosen operators). Obviously, the higher the operands are, the more points you will receive when you'll destroy a meteorite.

Name:

Didactical Method (no points, speed won't be incremented)

Admitted operations
+ - * /

Highest number forming the operation

Sounds
Yes No