My Pomodoro Timer, Feedback very much appreciated

It was such a simple concept but so hard to code. I have still have to think of better ways to make this. However, I would love your feedback.

If the timer and the break (set them both to 1 minute) is ended I get this:

Also, it would look better if you inserted an extra zero, so 12:01 instead of 12:1.

I like the sliders, but you should definitely add in zeros where necessary, and use a monospace font for your numbers (if you aren’t. It’s hard to tell because of the zero thing.)

Almost there!