Todo app review and checkbox issue

Hi everyone I was just wondering If I could get some thoughts and feedback on my todo app to see where I could improve. Also, one current issue I'm having the is with the checkbox. I'm using the materialize framework to help create the UI but I can't get the materialized styled checkbox to function properly. My way around that was to place the standard checkbox over the materialized styled one with the help of positioning and Z-index, with the opacity at 0. So the checkbox can still function while the materialized checkbox displays. The issue with that is that If I input a length task the standard checkbox moves. Link to todo-app()