https://en.wikipedia.org/wiki/Polanie_(video_game)
See https://github.com/jstasiak/polanie-resources for other Polanie resources.
The source code of the game and its editor can be found here:
Haven't tried, not likely.
It's been formatted using clang-format and converted to UTF-8, that's it.
Kod źródłowy gry Polanie.