Love this version of Yahtzee! Have been playing a bunch. A couple friendly suggestions:
1. It'd be neat if there was a running total for the 'Counts', letting you know how close you are to getting over 63. Counting those totals up to keep track is sort of a drag.
2. When selecting from the five dice you've rolled, I kept cycling to the far left or far right thinking that it'd loop to the other side - this would make selecting dice to hold so much quicker!
3. For beginners, I wonder if highlighting any of the potential scores you could select from your current dice roll would help teach folks what they all mean (e.g. you've rolled a 1, 2, 3, 4 and the Small Straight box is automatically highlighted).
Great work!