Interesting game! I liked moving the mouse to block the fireballs. The spinning mechanic was hard to control, and it may have been more fun to have a simple bounce instead.
The dragon and wizard look great, but it was odd that they were such drastically different resolutions. The cave background was nice. The music only came out of the left ear for me, and the fireballs seemed to scale down when the dragon was hurt.
It was fun to play.