Weird. You're on v13, right?
Was there a blue screen with an error when it crashed or did it just crash to desktop?
Also, are there save files that were autosaved when it crashed? (They'll be called something like CharacterName-error-2020-03-01 13-30-56.sav)
I got a blue screen error when I went to check my achievements. Wild, alright. Here it is:
Error
gamestates/gamestats.lua:163: bad argument #1 to 'sub' (string expected, got boolean)
Traceback
[C]: in function 'sub'
gamestates/gamestats.lua:163: in function 'switch'
gamestates/menu.lua:197: in function 'keypressed'
gamestates/menu.lua:232: in function 'mousepressed'
main.lua:126: in function <main.lua:125>
[C]: in function 'xpcall'
I released a new update that should fix the achievements crashes, anyway.
Messing around with your save file I couldn't get any silent crashes to occur, though. Do you happen to remember what you might have been doing or what might have happened soon before the crashes? Your save file was on level 3, were they any more/less frequent on any of the levels?