Hey, I really enjoyed this game and showed it off to my friends! The dice being actual physics objects instead of a fancy graphic for a random number generator was a very fun gimmick that I can see tons of ways ya'll could expand into cool features. The game had a soft "paper mario" vibe to me, specifically with how things could "break the fourth wall" and interact with game mechanics (like the dice hitting a character causes them to bump it slightly) and seeing more of that would be great (maybe a boss that kicks/attacks your dice after it lands or purposely "traps" a die that you can throw other dice at to free).
More talk about what's there than wishful thinking, the concept of deck building with dice was very novel and I enjoyed it greatly even though I don't usually like deck builders much. I also cannot stress enough how much the dice being an actual object was fun to play around with, but it does lead to some potentially unintentional things.
I learned while playing that if I flicked the mouse in a specific way, I could get the d6 to land on a specific side pretty consistently (I think I was able to do the same with another side but I don't recall as well there). My first win admittedly abused this by having a strength buff on that side (it was the very top of the d6 if I remember) with the rest of the sides being multi-hits so I was able to sort of "cheese" the game this way, but it was fun that the dice rolled in such a direct response to how I rolled it.
I'm not really sure if I would advocate for this being changed, as it was fun to discover and not the easiest learn how to do it consistently, but if you wanted to resolve this you could add a bit of a randomized "push" to the dice when released or utilize a dice cup/bowl object maybe? I'm sure ya'll will have better ideas if you did want to prevent this behavior.