This was my entry for Ludum Dare 41:
The current version is in the Current-Version directory, Previous versions are in the Archives directory (The date code at the end of the filename is in the format YYMMDD)
The one submitted for the challenge was Ludum-Dare-41-180421.zip (21st April 2018)
I have since updated the game several times and added new features.
Python <= 3.4
└pygame <= 1.9.2