I'm sorry the timing is too precise for you. If you really can't do it, here's a 50% speed version (updated): https://auroriax.github.io/PuzzleScript/play.html?p=498c0db3382c07ea6ec88eb265b6db82 (It's also hackable in case you wanna skip parts that are too hard)
Edit: Also make sure you are only holding down keys when you need to, see my other comments for more info