Thank you for this detailed feedback! Yes I was trying to make the game with actual rolling dice rather than make whatever game I wanted and slap some dice onto it.
About having to try to drag things into the holes, that's interesting. Not sure if you figured out you have to squeeze the dice on the left and right to make the hole bigger, which is unintuitive because in real life dice cannot be squeezed, and someone else commented also that they didn't figure that out for a while. I'm tossing up between whether I need to just make the playspace wider or try to lead people to this realisation in the tutorial. Anyway, really useful feedback, thank you for taking the time to write it all up!