This is our first homebrew release and hope its useful. 

Do not mistake this for a normal calculator.
This calculator calculates different formulas for several shapes and figures.
Perimeter, Area, Surface Area, Volume, Lateral Surface Volume and more.

Controls:

Start - Brings you to a pause menu where you can exit, change shapes, or continue.
Up and Down - These two buttons change what is selected. 
Right and Left - These change the values of shape dimensions.
R and L (shoulder buttons) - some shapes are more complex and have more formulas. You use these to 
get to them when you selected a shape. (you can see in the bottom if you're at a shape that has more formulas)
X (or 'Cross') - executes command at menus.