Client for playing 300 publicly available Sokoban puzzles on a computer or phone.

regression: dropping files on the window

Also improve the test to catch this next time.

Created by  Kartik K. Agaram  on August 19, 2022
H3KWPK3GXISOB25HP3USPDJLY4Q3MYDDD77PPQ7OGBVEYG23D7JAC
Change contents