I think there's a really cool game in here with some additional work (and also love that we had a similar idea of dice "walking" with progressively smaller dice numbers.)
The look and presentation are definitely on the right track, very relaxing.
The gameplay makes sense after reading the rules and the extra info you left here, but it still needs tweaking. Randomness in a puzzle game can be tricky, as you don't know if you'll have an actual solution each time you (re)start a level. In my head this could go one of two ways:
(1) No randomness, or at least a more deterministic outcome each time: with a certain "state" of the board, you always get the same sequence when placing a specific die. Otherwise, you'll never feel you're "advancing" the puzzle, and you can't build the sequence out in your head to reach the goal in a satisfying and "earned it" way. That way you can also ensure that every playthrough of a level has a viable solution.
(2) Fully embrace the random: throw the set goal out of the window. Turn the goal into making something aesthetically pleasing, or making the highest tower, or getting the most dice on the board before not having more viable dice to place. This makes the game less of a puzzle and more of a toy, but it has its own value and is more of an experience.
Sorry if that unsolicited wall of text seems like a lot. It's just that I think there's a really neat idea in this game, and my mind worked through the design as if it was my own, figuring out where to take the prototype next. It also doesn't mean that what you submitted is bad, quite the opposite actually!
Anyways, I'll stop my rambling, good work and good luck :)