If not then you can install it from here
2.Clone the project repo on you system by either downloading the code or by using git clone
3.Run npm install
after opening the terminal in the project folder and then run npm start
and go to the required domain(localhost:5000) in your browser.
4.Select the photo of the grid/crossword (make sure image quality is good)
This will work correctly on square grid.
5.Enter the words in the text box seperated by space(make sure input format is coorect).
6.Hit Submit.
This is very good example of using Data Structures in real world projects.