Thank you!
Yeah, the issue with only sometimes getting hit when slashing through an enemy is because there's a very short windup period before the i-frames from the slash kick in. The intent was to add a bit of risk to using the slash, but since there's not really a clear indication of when that period occurs it kind of just ended up making the slash feel confusingly inconsistent even for me. I ended up shortening that period as a last minute attempt to mitigate that but I think I probably need to go further and just completely remove or rework the mechanic entirely.
The issue with the black screen is definitely a really weird bug, could you give some more details about what the exact inputs you were trying to make when quickly quitting and reloading were? Also, I'm not sure what exactly you mean by the file refusing to load - did the game get stuck/freeze again when trying to load it, or something else? Does the issue persist if you try going back into the game now?