Some players have reported a bug where the game crashes immediately after the MELTCLOCK.Inc logo appears following launch.
Here is a workaround for this issue.

Workaround Procedure

Press the Windows key + R to open “Run”
Type %appdata%
Press Enter to open the AppData folder
Move to
AppData\\LocalLow\\MELTCLOCK\\LazyWitchFactory
Delete all old save data files located in this folder

This issue appears to be caused by incompatibility with old save data, and it has been reported that following the steps above resolves the problem.

We will continue to investigate whether we can implement a mechanism within the game to automatically delete old data.
We apologize for the inconvenience and ask that you follow the steps above for the time being.