[Feature request] Add difficulty levels

Lets say in Beginner level player has to select right option from 2 options
In easy from 4 options.
In normal from 6 options. (should be default)
In hard from 8 options.
In ultra hard from 10 options.
In expert #3

No files, tests, or entry points are named. Start by locating the code that generates the answer options and controls game difficulty, then determine how difficulty selection is represented. Done means all listed levels consistently present the requested option counts, with normal as the default and the expert requirement clarified.

Written by the indexing model from the issue text.