As one might have reasonably deduced, Mouse makes the player move half as many spaces as they normally would, rounded down.
This was sort of a late idea, by which I mean I had the thought that we should see Catalina throw the dice while that big a while ago, but I completely neglected to include it in any script until... Well, PAST the last minute, really, given that this was posted late on a Monday.
The last panel, at least, was a late idea. Sorry, Ashley’s player piece! Nothing personal, you were just in the right position for something like that to happen!