Ah yes, the tilting - I was wondering if I was supposed to do that more often.
Only problem is that the iPhone version expects you to physically shake the device to tilt. So in other words..... take your focus off the ball for a second while you shake the damn thing and just hope you didn't fudge it up because you couldn't see what you were doing. Considering I'm spending all of my time trying and praying not to lose another fucking ball, I think it's safe to say I can't even think about tilting. I'm willing to bet the PSP version (which I haven't played) makes it so much simpler with a tilt button.