Horrible.
The music was enjoyable, the concept was great, but everything just screamed buggy. Couldn't see score, enemy would glitch and not swing, eagle would come after a set time and either make or break the match, not to mention the game hangs in several places. I would smash hit the ball and the enemy would get knocked back, but the ball would bounce back at my character and knock me back further than I did them! Couldn't even hit the reset button, because all the stat stuff stayed in place after the enemy would fall off and you're forced to F5 or whatever. The ball sometimes passed through the enemy and didn't even knock him back, in which case caused my defeat because the ball came down and he smashed it into me, and that time it hit.
In 5 times playing it, the first two times the game hanged, the third time had to reset because the ball stopped moving, eagle knocked me off the fourth, and the fifth time I described already, ball passing through and then hitting me.