The game is both incredibly simple and incredibly difficult. The game is very well polished and tuned. There's nothing but jumping here, but jumping is fun. A great example of how to implement movement in a platformer.
Unfortunately, no matter how much I tried, I couldn't get into that narrow passage. Yes, you can joke your dirty jokes, but it's true.
So I do not know how long the game is, but if there is still as much as I have passed, then checkpoints would not hurt.
However, who would say. I also made a difficult platformer and also without checkpoints)))