I've added some changes in the newest version, that hopefully reduce the likelihood of such errors. Generally I'm not sure if it is clear, that you can click anywhere and the game tries to save again.
When it happens again or you have some additional information about what you've done when it happened, please send in a bug report.
simultaneous map and world fights would be nice. I dont know how many upgrades I've lost because of having tons of maps of many different levels. Also, Instant kills should be waaaaay more faster than they are now. Clearing a map is too slow even if the enemies are ridiculous against you
 "Crafting Idle Clicker"){kind=icon}
 "Trimps Preview"){kind=icon}
 "Game.Init()"){kind=icon}
 "Kill the Plumber"){kind=icon}
 "Galactic Clicker"){kind=icon}
 "Extrasistole"){kind=icon}
 "Idle Mine EX 2"){kind=icon}
 "SandTest"){kind=icon}
 "Deeper Sleep"){kind=icon}
 "Untangle"){kind=icon}
 "Solarmax"){kind=icon}
 "Pretentious Game 3"){kind=icon}
 "The Last Door - Chapter 1: The Letter"){kind=icon}
 "Take Something Literally"){kind=icon}
 "Bermuda Escape"){kind=icon}
 "Urbex"){kind=icon}
 "Deep Sea Hunter"){kind=icon}
I've added some changes in the newest version, that hopefully reduce the likelihood of such errors. Generally I'm not sure if it is clear, that you can click anywhere and the game tries to save again. When it happens again or you have some additional information about what you've done when it happened, please send in a bug report.