it wasnt good but it wasnt bad
First off A red ball? Terrible enemy, but against kirby I can accept that, but even so, a ball is the easiest thing to animated and yet here it's not animated well. Did you do frame by frame animation for the ball? It seems to me it would have been much better if you used motion tweening. Sometimes the ball dissapeared that was just i dunno i didn't like it. Then kirby did that whole thing at the end there, what was that? Did he implode a spirit bomb upon himself? But being your first animation this is all acceptable. The biggest thing that brought your animation down was having no background, sometimes it looked like the characters were floating across nothing which is bad. It's a good start and I believe from here you can go on to make much better stuff so keep on keepin on, lifes a garden dig it.