Nice graphics, but game ruined by bad controls
I feel bad giving this a low rating like this, since the graphics and design are very nice. This just happens to be one of those games that leave me wondering how a game with such nice graphics could be ruined by serious shortcomings in terms of gameplay.
The main complaint are the controls. It seems like the whole game has a graphics oriented design: you first create the animation and then try to fit the controls into the animation. Well, the animations are very nice, but this is supposed to be a game so that doesn't seem to work really. Just moving back and forth seems too clunky and you almost have to stop to shoot at your enemies. You can't even shoot while airborne.
Because of the clumsy controls there can't be much enemies around to make the levels manageable, which leads to two things: boring levels/foes and a feeling of being bad at playing a game like this. A good game of this genre would do the opposite: give a positive challenge that also results in a feeling of satisfaction once you beat the enemies.