I don't know if it's just me, but I had struggled with the controls. Especially when the ball is stuck at the corner and you try to pull it upwards, you just feel useless and powerless. I have played the browser version, anyhow, some playtesting is surely needed here. So, apart from that, I actually enjoyed the game. From the sound of the waterfall, the beautiful piano melody, and the sound of the balls hitting each other like pool balls, the sound is great! The visuals are minimalistic, but not poorly made. On the contrary, everything looks like it belongs there, the minimalistic look fits well with the sound and the feel of the game. I especially liked the part where you had initially just a couple of balls (clearly not enough of them), and as I desperately trying to pull up the big ball I figure out that: "Oh! I can activate more balls! it's much easier now, it makes sense!". I liked that part. Keep it up! ;D