Seen it all before
Your game is admitidely made very well, no fault there. Nice background, fitting music blah blah blah. Yes blah is exactly how this game feels as it is a tiny modification of the countless versions out there. You obviously have talent as a programmer, just put it to use insted of wasting it on this
Horrible
#1 Rule of physics based games is reduce the effects of chaos.
If I have to play the same level EXACTLY THE SAME WAY 10 times in a row to beat it (because the balls didn't settle right or whatever), that's just bad design.
I know it's impossible to do a physics game without a little chaos, but it looks like you didn't put any effort into testing for that, as nearly every level I played had to be "beat" about 5 times before the solution actually worked
Don't get it
I don't see the appeal of this. There are so few options on each level - the game is far too simplistic. It's basically, attach the thing, watch it all fall over. That's all.