Thank you so much for your feedback. I hope you give it a few more tries. I am planning to remake this game in a more modern engine and taking in consideration all the feedback I received regarding difficulty.
I think the current difficulty is excellent for hardcore mode. 10-20% wider margins for landing moves would be great for older normal people that love metroidvania and platforming challenges. It is really a masterpiece, how small, minimal and packed with challenges it is, that all feel different from one another. You have a wonderful mind.
Have a fruitful day!