While typing, the cursor's alignment is a bit off from the words, which makes typing hard, especially when it comes to spaces, one can't tell whether the space has already been typed or not, leading to a poor typing experience.
I would suggest monospace fonts wherever there's any code. For example, the homepage looks sick, but the animation playing on the right looks a bit off due to a combination of unusual line spacing, and the serif font.
Changing the colour of the wrong keystroke, like when one types something wrong, the colour of the wrong character is too similar to the correctly-typed characters which makes it difficult to spot mistakes.
Add indentation to code: Currently, the code appears in one line, and is hard to decipher. Maybe prettify it first using prettier, and then have people type it.
On Mac, use Cmd+K for command palette rather than ctrl+k
Hope this feedback helps and will make your product better. Great going, and I hope you get a mention in this hackathon 😊
Anuoluwapo Balogun
Data Storytelling
Amazing app 👏🏽