Just added a new Patch to Slender Reborn Which comes with Normal and Hard Mode. There's a bug that doesn't allow to save the Hard mode when you start a new game. Just set again, and it's insane :D

The only unsolved Bug that I found was :

The Hard mode never saves...
It means you play in the hard mode and if you die or wish to play again, you will need to pick The hard mode again.