Thanks! That might help clear things up. Your 4k monitor could be making the dice look fuzzy, but I don't have a higher resolution screen to test the game on myself so that's just a guess. (It certainly sounds like what I experienced at 1080p with dice sprites of a smaller size.) The physics issue almost certainly isn't just at your end: I suspect it's probably a quirk of how the new dice spawn then move. It shouldn't ever happen with the only die on screen, but once there's another one bashing about it's possible for some of the forces to cancel each other out: I've seen it happen on several occasions myself.