In User Mode, you can also decide if the problems are too easy or too hard. You can click on Easier and a new set of easier problems will be displayed. You can click on Harder and a new set of harder problems will be displayed.
In User Mode, you can decide which missing element to supply by clicking on
a button in the What's... section of the screen.
Click on ...my output? to be given the inputs and the rule and to supply the outputs.
Click on ...my intput? to be given the outputs and the rule and to supply the inputs.
Click on ...my rule? to be given the inputs and the outputs and to supply the rule.
Click on ...missing? to be given some of the inputs and outputs and the rule and to supply the missing inputs and outputs.