I admire your boldness to turn dice rolling with a FG. However, I think it might be better suited if you could do attacks normally, but maybe the die roll creates a different effect each round you fight, like wind that makes movement weird or maybe lava where the ground starts to shrink. This would mean players have to adapt to the rng, but aren't 100% reliant on it. Just my idea.
Also LOVE the sound. Opening the game with a "BWOOOOOM" was great.