Fun little puzzle game! I like how quickly you communicate the core mechanic without even explicitly saying anything. Just two intuitive buttons in, I was like, "Ah, okay, I see what this game is."
I also like how you threw in the twist with the stoppers after a few puzzles. Though, I did feel the stoppers were a lot more forgiving than having bottomless pits if you make a mistake, so I wonder if maybe they should've come first.
My main issue is that not being able to see every side of the die led to a bit of trial and error at points.