Sleeping coffin (Full game) by Dr. standback (itch.io)
You will go on amazing adventure making many choices.
Make your choices carefully and try not to die on the first level because you wanna kiss some grandma skeleton that can kill you.
And make sure you save often.
Don't try to challenge yourself because this game is already challenging and can be punishable.
You will have an easier time playing Dark Souls than this but as long as you're not trying to find the final boss