I think this game was more frustrating to play than it was fun. I understand that you were trying to go for a hacker theme where you brute force each letter in the game by jumping up and down on them, but I don't think it works here. While I do agree it is creative and imaginative, it came across as grindy and repetitive too.
Take for example the letters at the ends of the word, all I did was hold the left or right arrow keys and fall to my death until I got the right letters. I also didn't understand how changing the letters worked either, sometimes the letters go up, sometimes they go down. I didn't really make sense to me. The game also says you can dash down to reveal a letter after collecting 8 bits, bit it wasn't explained how it was done in the tutorial.
I do think that there is potential for a game here but I think the concept needs to be revisited. Maybe instead of platforming you could shoot the letters or hit them with a ball? Also maybe instead of dying to reveal one gray letter you could reveal all of them? That could fix the repetition a bit.