I agree, the UI is a bit hard to guess but not "too" hard, so you get it with some trial and error (so it doesn't block the gameplay!).
Interesting idea that it's on the whole world that the effect on the dice work. Usually, it's much more on contact!
I didn't play too far because there are way too much game to test :p, but I really liked the concept/the idea.
My only true comment about something that would have been able to change during the short amount of time is the too-aggressive background. One more time, it's not ruining everything, it's just something that would improve the overall feeling I guess!
Anyway, congrats!