Nothing too special.. the Gravity changing mechanic has been done before, and done better, and the mouse control just makes it awkward and confusing.
unfortunate that you don't like it :( The mouse controls are loved or hated, if you want to play with gamepad, you can just download Moyo HD from http://moyo-game.com/hd (which btw. also runs smoother and has better graphics ;-))
nice concept with changing the gravity thing... I guess you'll need some training, it's quite hard for me :-)
thank you, just try harder ;-)