Overall, it's great that you were able to appreciate the game's unique mechanics, but it's understandable that the difficulty level may have detracted from your overall enjoyment of the game.
However since it's a short game, it sounds like the difficulty level may be a bit too high for your liking. It's understandable that the lack of checkpoints can make the game feel frustrating and punishing, to start all over again.
Thanks for sharing your thoughts and feedback!