First time playing this game, and my first round was very fun!!! Your game is very polished UI wise, and the characters are very cute too. I didn't find any bug, I played the PC version. I think you nailed it with that idea of a cube matching the panel colors. Your game also reminds me of my childhood when I played a lot old games from Nes and Snes. Here is my score:
I don't know if you plan to make a two player mode in the future, but there's is a easy way to make it and will be fun:
Two players start, both with their own dice/panel set up, but every time a player makes a combo it makes the opponent suffer by spawning more panels in his map, so the players are competing to make combos in order to overwhelm the opponent, like in the game Wario Woods from Snes.
Nice game, I see a nice future on this project.