Why isn't one working and how do I do backspaces on my code

Question

https://code.sololearn.com/W976UwTgH2Bv/?ref=app

Answer 1

Gavin MacPherson See the above code again.
Now Space, Backspace, Tab and Enter button is working .

I hope helpfulness

Answer 2

I hope helpfulness

https://code.sololearn.com/WFIwv6V6c82t/?ref=app

Answer 3

Mawlud Fariq thanks

Answer 4

One more question how do I make tab backspace and space work