Well, this game has some promise but there are a few obvious flaws.
Right off the bat, you're given no idea on how you're meant to control the ball. No tutorial is given, and this is quite frustrating. Especially because of the death counter. Having a low amount of deaths gives a sense of accomplishment, and if you're given no instructions on how to play that feeling is going to be diminished pretty quickly.
Speaking of deaths, the fact that you can die within a second of spawning seems very unfair. There should be a single safe platform just under your spawn point. Kind of nit-picky, but it's still valid. Also, once you spawn you move down WAY too fast!
And the controls. While still, they're far too sensitive. Just the slightest brush of an arrow key can send you hurtling towards a wall at a speed faster than an average shopper on Black Friday (if you'll pardon the pun :) ), yet once you've gained momentum the controls aren't nearly responsive enough - causing me more than my fair share of deaths. Adding on to this, once you stop moving in a direction by pressing the opposite arrow, you have a split moment to let go, or you're flat against the wall. This is a huge problem, especially in the first stage - where the walls are pretty tight for the controls.
Overall, an...okay game. Not unplayable, but not really the most enjoyable. It was good in theory, but needs some work in practice. :)