I feel like there was a lot of telling, but not showing what needed to be done or what the goal is.
The alignment of the operators after adding the dice to a row didn't align. I thought I was changing the operator for a 1, but it was changing a different number, changing the total from 19 to 11?!
And speaking of alignment, the back arrow was right on top of the first dice in the upper row. My display is 1920X1080 and I'm using Chrome.
After the goal is completed, it is unintuitive where to go from there. I clicked around and saw that you can select another quest, but it is not easily apparent that you can win the entire game, only a few rounds or quests.