Glad you updated this, because I loved it on my first try! The Heavy dice that stay on the board are genuinely the best part and makes you do the most thinking about actual future moves, I'd love to see more dice that incorporate some kind of bonus beyond the turn you play it on.
(Like they reroll the existing dice you're currently holding onto or help boost the chance of getting another dice like it out of your bag next turn)
Really you could do whatever you want, the concept is really solid!
Marvelous work!