How about gameplay? Do you like it?
Needs something more entertaining, bit boring. No real sense of accomplishment.
How long you played th game?
About 15 mins.
How about usability and controls?
The camera movement was okay, but felt a bit too rigid, maybe adding a bit of acceleration and/or smoothing so would enhance the feel?
Graphics and style?
They were okay, bit boring. Adding some animations/effects would help. The level ending really lacked any sense of excitement. Adding particle effects and animation would enhance things.
please, write if you find any technical issues
Also there is a typo in your tutorial, but since I couldn't find a level indicator I don't know what screen/map/etc.
Lastly, I found it a bit frustrating that often I could click a ball that had "no moves" and then have to click it again to deselect. Instead I think you should play an animation with feedback sound showing it has no moves. And possibly add a hover indication that a ball has no moves so they don't try and select it. This could be combined with possible moves/balls when you select a sphere. At least in the early stages until the player is used to the game.