I was assuming the app to be written with a framework like React or Angular, and was pleasantly surprised to see that it's just a html and a JS file with some styles applied - very refreshing.
And jquery. And jqueryui. And handlebars. Would angularjs been that much heavier?
I wonder how online scrum boards I've seen so far don't seem to visually integrate User Stories. On our physical Scrum board, we have big stickers for user stories, and tasks are written next to them. I've yet to see this implementation on a virtual board.
The download button is counter-intuitive. Instead of letting you download your tasks, it downloads the source code instead.
Double-clicking on an item does not let you edit it.
Opening the app in two different tabs simultaneously does not work. When moving tasks in one tab, the changes are not reflected in the other tab.
Edit: Corrected the typo.