Protect a treasure from pirates.
Sink a pirate ship with a cannon shoot.
In order to sink the pirate ship, you should calculation.
Let's play game and improve numerical ability.
★ Full Version ★
There are four operation codes.(+,-,×,÷)
There are three kinds of difficulty.(easy, normal, hard)
Each difficulty has 32 levels.
1. Touch pirate ship.
2. Pirate ship turns green. check equation.
3. Enter the result of calculation with the number buttons.
4. Fire a cannonball with touching Fire button.
5. If you answer wrong, the touch of Fire button and then re-enter.