Wtf. Level 20 is easy. You just fire a stickman into the ball, then fire another stickman through the wall, before the ball hits the stick which knocks the finish off of the other stick. The other stickman then hits the finish and you win.
It sounds complex, but that's really just my explanation skills.
I hope your happy 2DArray. You just stole one hour of my life and now I can never, ever get it back. Why did I play this game in the first place? It's not even good! But, I had to go right until the end before realising that, didn't I..
Gah.