I love this little game!
I'd love to see some keyboard support and a way to quickly jump to the end of a spin so I can play games faster.
(Also, like Jay, I didn't realize that the "+2 Damage" type symbols meant damage against me at first. Maybe a different description like "TAKE +1 DAM" or something?)
You might be interested in a similar game I made called Slay the Dragon. It's a similar slot-machine-based combat system, only it adds some progression elements into the mix, allowing you to add new symbols to your slot wheels as you go.
Anyway, great job. Love the look of it!