It's a great start!
Feedback:
- Bug on level 2: defeating right-side enemy instantly wins level.
- UI needs a little more help:
- Dice should auto-roll when clicked instead of having to click another button down below.
- AND/OR the chosen dice can use some form of indicator, such as a colored border. The result of the roll can also appear as overlay on top of the dice instead of at upper right corner, at which time you can also apply border effects on enemies to indicate it's time to attack.