Super fun game! Reminds me of the premise of the board game Dice Forge, with all the switching of dice faces. The fact that the game actually had dice variety was a huge surprise! I adore this game. The risk/reward of using expensive abilities or a lot of cheap ones and trying to manage dice energy costs was super fun!
And please keep the d2/coin in, I love it a lot. Put two "Gain 5 shield" faces on it so I had guaranteed shields each turn I needed them! Though I recognize I could have put my Strength faces on them, too... Love the strategic depth! You have an excellent game here and I would love to see it explored more!
Not to mention, I love the art style. It's a very simple 2-bit/8-bit(?) 2.5D style game reminiscent of how other games like Triangle Fantasy handle making 2D sprites 3D, which I find has a lot of charm.