This is quite a nice little dice game. Gameplay is just simple drag and drop but there is quite a bit of decision-making involved, luckily making such decisions is not too hard, where at the end of the day, it's just big-number-better type of gameplay. Balancing is done quite well, and the progression feels smooth with gradual difficulty increases. The arkworks are also really nice. I love the hand-drawn style of the game, and that gives me that 2000s Japanese indie vibe.
A few minor nitpicks would be that there should be a better way to indicate health loss/gain. Preferably doing that +20, -10 popups thingy directly about the charcters' head. I would also suggest writing the range of the die on screen at all times, instead of hovering out it with a tool tip. Last but not least, using Enter to end each turn is quite a bad idea. Given the game is mainly mouse controls, adding a button to end each turn would reduce some frustration when playing.
Anyway, with all that said, the game is still quite well made. keep up the good work!