Some files have a mixture of HTML and JAVASCRIPT in them, It's probably a good idea to refactor it so they are separated.
It's also worth separating out each aspect of the code into different folders.
Finally, there are a few visual improvements that could be applied, the banner is pretty ugly and the colour of the buttons are wrong. So to add some visual improvements there first would be a start. It's probably worth doing the visual overload as a separate ticket further down the line.
Some files have a mixture of HTML and JAVASCRIPT in them, It's probably a good idea to refactor it so they are separated.
It's also worth separating out each aspect of the code into different folders.
Finally, there are a few visual improvements that could be applied, the banner is pretty ugly and the colour of the buttons are wrong. So to add some visual improvements there first would be a start. It's probably worth doing the visual overload as a separate ticket further down the line.