I quite enjoyed it!
It presents well (graphics, audio). It plays alright. The 3D dice rolling is weird. Sometimes the dice hit the bottom of the cup? And you can just throw the dice away on the sides, for some reason. And I don't know if throwing them to the side really count.
I saw sometimes the cup is red or blue. Does throwing an attack or defense die in those areas give bonuses?
Also, I saw that sometimes there were icons next to characters, but I couldn't figure out what they meant. Giving a tooltip over that would have been nice.
I really like the hover over for the credits. That's really quite awesome and I wish I would have thought of that for my game. But also, some credits for the art and sounds would be nice, for the ones that you hadn't created yourselves.