Here follows a selection of the program contents. These are from the English version running on Linux.
When you first start the English version of Mathmoon you see:
two buttons and a moon
You get to practice some elementary geometry:
identify a triangle
Naturally, you should practice some addition, subtraction and
multiplication:
subtraction
And some more geometry:
the perimeter of a hexagon
After several more tasks, you hopefully arrive at:
the congratulation screen