How tough are you, really? Can you fit the pieces onto the top board? And how fast can you do it?
Hint: you can cheat on the first level by looking at the icon of the app. :-)
After that, you are left on your own. Hexominoes contains many levels to solve, for hours of fun.
So, what if you just can't solve a certain level? No problem! Just drag all the pieces to the bottom of the board and shake the iPhone. The black piece will be re-positioned and you're ready to start again. And next time you start the app, it starts right where you left off.