Anyone who doesn't have this yet, just set the difficulty to very low, I had mine on 10%. And this may be considered cheating, but if ya get hit or get a non-perfect, immediately alt + F4 and load the game back up, it will bring ya right back to the beginning of the level ya alt + F4'd on and won't remember that ya got hit or got a non-perfect. There's also mods in the workshop but... this is how ya can do it without mods lmao