Making a checkpoint save system for a game like this is really simple. There’s a couple of guides available on the forum. This was just the first I managed to dig up:
Keep in mind, people are playing a game to have fun, or at least get some sense of satisfaction from completing it. No matter how fitting the feeling of frustration is for the theme of the game is, it is not fun. People won’t pay for something that will only frustrate them. (Unless you’re writing highbrow literature, which this isn’t.)
