Overall my impression is negative, it's not a bad game but it just doesn't offer anything you can't find in another, better game. No explanation for what I was doing was a downside, controls could've been tighter (I tried jumping forward and shooting a fireball backward, but he shot it forward instead...), environments were pretty bland so there was nothing to look at, enemies were more annoying than hard (there was no reason to kill them at all so I ended up skipping most of them... and the game totally let me do it). Music was good.
That said, I did finish it. If I finish a game it's because it compelled me enough to reach the end. So you succeeded I guess, congrats.