These are various Berlyne problems. Each of them has a short description in form of a README file.
To use them, just checkout this repo and put the problems you like into your Berlyne problems folder.
To do so, just do this:
cd /path/to/berlyne
git clone https://github.com/rugo/berlyne-example-problems
mv berlyne-example-problems/* problems/ # * for all example problems
For details, see Berlyne Wiki