There is obviously very little game here. I am sure that you are aware of this and did this purposefully, so I won't focus too much on it. I do however think that the idea would be a lot easier to judge if there were a few more situations to test it out on, especially with regard to the defense die.
I also wish to mention that it is incredibly difficult to move the pips. It is also rather awkward that there are pips with numbers. Shouldn't each pip be one, just like on real dice?
Moving on to the concept, I do like the idea. Being able to visualize stats in such an easy and intuitive way is appealing, but I truly believe that this isn't necessarily the way to do it. Why dice? I am aware that the prompt required the use of dice, but, other than that, it feels like there is no real reason for the stats to be represented by dice.
I do like the most basic idea, but that's honestly about it.