While I was playing this, I could tell that this game is more suited for mobile devices. Especially with the drag mechanic to get the ball to where it needs to go. I can still play it on my computer, but it seems a lot harder than it should be. I can't get past level three using my computer. The ball just wants to go wherever.
For the gameplay, I liked it, but like I said, this is a game more suited for mobile devices. I could probably give a more in depth review about the gameplay if I was playing it on a phone or tablet. For what I can say, though, It's simple and isn't a bad concept. The fact that there's gravity that kind of pulls you is kind of neat.
The music is very calm and relaxing. The space background was a nice touch, too.
For what you should improve, you should've made it so the player can't just play any level they want from the start. It's silly that I can play this game and just play the very last level without playing any of the previous levels.